{"id":11139,"date":"2023-12-11T17:23:52","date_gmt":"2023-12-11T16:23:52","guid":{"rendered":"https:\/\/www.htt.it\/?p=11139"},"modified":"2026-08-23T11:56:44","modified_gmt":"2026-08-23T09:56:44","slug":"digital-marketing-glossary-seo-aeo-geo-advertising-ai","status":"publish","type":"post","link":"https:\/\/www.htt.it\/en\/digital-marketing-glossary-seo-aeo-geo-advertising-ai\/","title":{"rendered":"Digital Glossary: Digital Marketing Acronyms You Need to Know"},"content":{"rendered":"\n\n<!-- SECTION -->\n<section  class=\"   whitesection\" style=\"\">\n    <div class=\"testo-colonna-centrale htt-generic-text\">\n        <div class=\"htt-container\">\n            <article class=\"htt-glossary\" aria-labelledby=\"glossario-title\">\n<header class=\"htt-glossary-hero\">\n<p class=\"htt-eyebrow\">Digital Marketing \u00b7 Glossary<\/p>\n<h2 id=\"glossario-title\">SEO, AEO, GEO, Advertising, Analytics and AI<\/h2>\n<p class=\"htt-lead\">SEO, CPC, ROAS, CTR: Digital Marketing has always been a field full of acronyms. In recent years, however, its vocabulary has expanded rapidly with new terms related to artificial intelligence, generative search, measurement, privacy and even new ways of shopping online.<\/p>\n<p>Alongside established concepts such as <strong>SEO<\/strong>, <strong>SEM<\/strong>, <strong>PPC<\/strong> and <strong>CTR<\/strong>, today marketing professionals increasingly encounter terms such as <strong>AEO<\/strong>, <strong>GEO<\/strong>, <strong>RAG<\/strong>, <strong>LLM<\/strong>, <strong>MMM<\/strong>, <strong>CDP<\/strong>, <strong>C2PA<\/strong>, <strong>ACP<\/strong> and <strong>UCP<\/strong>.<\/p>\n<p>This is not simply a matter of terminology. The changing language reflects the evolution of digital marketing itself: people no longer discover products, services and brands exclusively through search engines, websites, social networks and advertising, but also through <strong>AI Overviews, answer engines, AI assistants and agents capable of taking actions and making purchases<\/strong>.<\/p>\n<p>At the same time, privacy, first-party data and the growing difficulty of reconstructing the user&#8217;s complete journey have brought concepts such as <strong>incrementality, Marketing Mix Modeling, server-side tracking and Customer Lifetime Value<\/strong> back to the forefront.<\/p>\n<p>We have therefore updated our glossary, bringing together the main terms and acronyms that are useful for navigating today&#8217;s Digital Marketing landscape.<\/p>\n<\/header>\n<p><!-- ========================================================= NAVIGATION ========================================================= --><\/p>\n<nav class=\"htt-glossary-nav\" aria-label=\"Glossary categories\"><a href=\"#search-ai\"><br \/>\n<strong>Search &amp; AI<\/strong><br \/>\nSEO, AEO, GEO, RAG, LLM&#8230;<br \/>\n<\/a><\/p>\n<p><a href=\"#performance\"><br \/>\n<strong>Advertising &amp; Performance<\/strong><br \/>\nCTR, CPC, ROAS, CPA&#8230;<br \/>\n<\/a><\/p>\n<p><a href=\"#measurement\"><br \/>\n<strong>Analytics &amp; Measurement<\/strong><br \/>\nKPI, CAC, CLV, MMM&#8230;<br \/>\n<\/a><\/p>\n<p><a href=\"#adtech\"><br \/>\n<strong>AdTech &amp; Data<\/strong><br \/>\nDSP, SSP, RTB, CDP&#8230;<br \/>\n<\/a><\/p>\n<p><a href=\"#agentic\"><br \/>\n<strong>AI &amp; Agentic Commerce<\/strong><br \/>\nACP, UCP, C2PA&#8230;<br \/>\n<\/a><\/p>\n<\/nav>\n<p><!-- ========================================================= SEARCH & AI ========================================================= --><\/p>\n<section id=\"search-ai\" class=\"htt-glossary-section\" aria-labelledby=\"search-ai-title\">\n<div class=\"htt-section-heading\">\n<p><span class=\"htt-section-number\">01<\/span><\/p>\n<div>\n<h2 id=\"search-ai-title\">Search &amp; AI Search<\/h2>\n<p>From traditional search to answers generated by artificial intelligence.<\/p>\n<\/div>\n<\/div>\n<article id=\"seo\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\">\n<p><span class=\"htt-glossary-acronym\">SEO<\/span><\/p>\n<div>\n<h3>Search Engine Optimization<\/h3>\n<p><span class=\"htt-glossary-category\">Search<\/span><\/p>\n<\/div>\n<\/div>\n<p><strong>SEO<\/strong> encompasses the activities aimed at making a website understandable, accessible and relevant to search engines, improving its visibility in organic search results.<\/p>\n<p>It includes technical aspects, information architecture, content, internal and external linking, structured data, performance and user experience. With the introduction of generative search experiences, SEO also remains one of the foundations through which search engine AI systems identify and retrieve information from the web.<\/p>\n<div class=\"htt-related\"><strong>Learn more:<\/strong><br \/>\n<a href=\"https:\/\/www.htt.it\/en\/seo-geo-ai-brand-visibility\/\">From SEO to GEO: how brand positioning is changing in the age of AI<br \/>\n<\/a><\/div>\n<\/article>\n<article id=\"sem\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\">\n<p><span class=\"htt-glossary-acronym\">SEM<\/span><\/p>\n<div>\n<h3>Search Engine Marketing<\/h3>\n<p><span class=\"htt-glossary-category\">Search<\/span><\/p>\n<\/div>\n<\/div>\n<p>Historically, <strong>SEM<\/strong> refers to the full range of marketing activities carried out on search engines, including both SEO and advertising. In contemporary usage, however, the term is often used primarily to refer to paid advertising activities on search engines.<\/p>\n<\/article>\n<article id=\"sea\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">SEA<\/span><\/p>\n<div>\n<h3>Search Engine Advertising<\/h3>\n<p><span class=\"htt-glossary-category\">Advertising<\/span><\/p>\n<\/div>\n<\/div>\n<p><strong>SEA<\/strong> refers to paid advertising on search engines. It allows advertisers to display ads in relation to users&#8217; searches, using auction-based systems and payment models primarily based on clicks or conversions.<\/p>\n<\/article>\n<article id=\"serp\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">SERP<\/span><\/p>\n<div>\n<h3>Search Engine Results Page<\/h3>\n<p><span class=\"htt-glossary-category\">Search<\/span><\/p>\n<\/div>\n<\/div>\n<p>A <strong>SERP<\/strong> is the results page returned by a search engine. Today, it can include organic results, ads, maps, images, videos, featured snippets, shopping results and answers generated by artificial intelligence.<\/p>\n<\/article>\n<article id=\"aeo\" class=\"htt-glossary-item htt-glossary-item--featured\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">AEO<\/span><\/p>\n<div>\n<h3>Answer Engine Optimization<\/h3>\n<p><span class=\"htt-glossary-category\">AI Search<\/span><\/p>\n<\/div>\n<\/div>\n<p><strong>Answer Engine Optimization<\/strong> encompasses the activities aimed at making content and information easy to interpret and use by systems that provide direct answers to users&#8217; questions.<\/p>\n<p>The goal is not only to achieve a position in the SERP, but also to increase the likelihood that a piece of content can contribute to the answer provided by answer engines, AI assistants and generative search systems.<\/p>\n<div class=\"htt-related\"><strong>Learn more:<\/strong><br \/>\n<a href=\"https:\/\/www.htt.it\/en\/answer-engine-optimization-ai-search\/\">Answer Engine Optimization: a practical guide to AEO<br \/>\n<\/a><\/div>\n<\/article>\n<article id=\"geo\" class=\"htt-glossary-item htt-glossary-item--featured\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">GEO<\/span><\/p>\n<div>\n<h3>Generative Engine Optimization<\/h3>\n<p><span class=\"htt-glossary-category\">AI Search<\/span><\/p>\n<\/div>\n<\/div>\n<p><strong>Generative Engine Optimization<\/strong> refers to activities aimed at increasing the visibility of a brand, a source or its content within search experiences based on generative artificial intelligence.<\/p>\n<p>The focus therefore shifts from simply ranking a page to the ability of content to be <strong>discovered, interpreted, retrieved and used as a source<\/strong> by AI systems.<\/p>\n<p>SEO, AEO and GEO should not, however, be considered three completely separate disciplines. Their techniques overlap and, for Google, optimization for its generative search experiences continues to be based on SEO best practices.<\/p>\n<div class=\"htt-related\"><strong>Learn more:<\/strong><br \/>\n<a href=\"https:\/\/www.htt.it\/en\/how-to-master-geo-aeo\/\">How to master GEO and AEO<\/a><br \/>\n<span aria-hidden=\"true\"> \u00b7 <\/span><br \/>\n<a href=\"https:\/\/www.htt.it\/en\/google-ai-optimization-guide-seo-aeo-geo\/\">Google&#8217;s guide to AI optimization<\/a><\/div>\n<\/article>\n<aside class=\"htt-concept-box\" aria-labelledby=\"seo-aeo-geo-title\">\n<h3 id=\"seo-aeo-geo-title\">SEO, AEO and GEO: three goals that coexist today<\/h3>\n<div class=\"htt-evolution\">\n<div><strong>SEO<\/strong><br \/>\nBe found<\/div>\n<p><span class=\"htt-arrow\" aria-hidden=\"true\">\u2192<\/span><\/p>\n<div><strong>AEO<\/strong><br \/>\nBe the answer<\/div>\n<p><span class=\"htt-arrow\" aria-hidden=\"true\">\u2192<\/span><\/p>\n<div><strong>GEO<\/strong><br \/>\nBe a source for AI<\/div>\n<\/div>\n<p>These are not three eras replacing one another: they are different levels of digital visibility that coexist today.<\/p>\n<\/aside>\n<article id=\"llm\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">LLM<\/span><\/p>\n<div>\n<h3>Large Language Model<\/h3>\n<p><span class=\"htt-glossary-category\">Artificial Intelligence<\/span><\/p>\n<\/div>\n<\/div>\n<p>A <strong>Large Language Model<\/strong> is an artificial intelligence model trained on large amounts of data and designed to process and generate language. LLMs are the foundation of many AI assistants and conversational search systems.<\/p>\n<\/article>\n<article id=\"rag\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">RAG<\/span><\/p>\n<div>\n<h3>Retrieval-Augmented Generation<\/h3>\n<p><span class=\"htt-glossary-category\">Artificial Intelligence<\/span><\/p>\n<\/div>\n<\/div>\n<p><strong>Retrieval-Augmented Generation<\/strong> combines the generation of a response by an AI model with the retrieval of information from external sources.<\/p>\n<p>Before generating the response, the system searches for relevant information in documents, databases or web pages and uses it as context. It is one of the mechanisms that make it particularly important, including in AI Search, to produce content that is clear, reliable and easy to retrieve.<\/p>\n<\/article>\n<article id=\"ai-overviews\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">AIO<\/span><\/p>\n<div>\n<h3>AI Overviews<\/h3>\n<p><span class=\"htt-glossary-category\">Google Search<\/span><\/p>\n<\/div>\n<\/div>\n<p><strong>AI Overviews<\/strong> are answers generated by artificial intelligence that Google can display directly on the search results page, summarizing information from different sources and providing useful links for further exploration.<\/p>\n<div class=\"htt-related\"><strong>Learn more:<\/strong><br \/>\n<a href=\"https:\/\/www.htt.it\/en\/google-and-ai-overview-the-collapse-of-organic-traffic\/\">Google AI Overview and its impact on organic traffic<br \/>\n<\/a><\/div>\n<\/article>\n<article id=\"zero-click\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">ZCS<\/span><\/p>\n<div>\n<h3>Zero-Click Search<\/h3>\n<p><span class=\"htt-glossary-category\">Search<\/span><\/p>\n<\/div>\n<\/div>\n<p>A <strong>Zero-Click Search<\/strong> is a search that ends without the user visiting an external result. The requested information is obtained directly from the SERP, an AI-generated answer, a map, a snippet or other search engine elements.<\/p>\n<div class=\"htt-related\"><strong>Learn more:<\/strong><br \/>\n<a href=\"https:\/\/www.htt.it\/en\/zero-click-search-ai-reducing-clicks\/\">Zero-Click Search: AI is eating the clicks<br \/>\n<\/a><\/div>\n<\/article>\n<article id=\"json-ld\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">JSON-LD<\/span><\/p>\n<div>\n<h3>JavaScript Object Notation for Linked Data<\/h3>\n<p><span class=\"htt-glossary-category\">Structured Data<\/span><\/p>\n<\/div>\n<\/div>\n<p><strong>JSON-LD<\/strong> is a format used to represent structured data and semantic relationships in a machine-readable way. On the web, it is commonly used to implement the Schema.org vocabulary.<\/p>\n<div class=\"htt-related\"><strong>Learn more:<\/strong><br \/>\n<a href=\"https:\/\/www.htt.it\/en\/json-ld-aeo-geo\/\">JSON-LD, AEO and GEO: why a website needs to be understandable by machines<br \/>\n<\/a><\/div>\n<\/article>\n<\/section>\n<p><!-- ========================================================= ADVERTISING ========================================================= --><\/p>\n<section id=\"performance\" class=\"htt-glossary-section\" aria-labelledby=\"performance-title\">\n<div class=\"htt-section-heading\">\n<p><span class=\"htt-section-number\">02<\/span><\/p>\n<div>\n<h2 id=\"performance-title\">Advertising &amp; Performance<\/h2>\n<p>The metrics used to understand how much a campaign costs and how much it generates in return.<\/p>\n<\/div>\n<\/div>\n<article id=\"ppc\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">PPC<\/span><\/p>\n<div>\n<h3>Pay Per Click<\/h3>\n<p><span class=\"htt-glossary-category\">Advertising<\/span><\/p>\n<\/div>\n<\/div>\n<p>An advertising model in which the advertiser pays when a user clicks on the ad.<\/p>\n<\/article>\n<article id=\"cpc\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">CPC<\/span><\/p>\n<div>\n<h3>Cost Per Click<\/h3>\n<p><span class=\"htt-glossary-category\">Advertising<\/span><\/p>\n<\/div>\n<\/div>\n<p><strong>CPC<\/strong> represents the average cost incurred for each click received.<\/p>\n<p class=\"htt-formula\"><strong>CPC<\/strong> = Cost \/ Clicks<\/p>\n<\/article>\n<article id=\"cpm\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">CPM<\/span><\/p>\n<div>\n<h3>Cost Per Mille<\/h3>\n<p><span class=\"htt-glossary-category\">Advertising<\/span><\/p>\n<\/div>\n<\/div>\n<p>It indicates the cost per thousand advertising impressions and is particularly used in campaigns focused on awareness and reach.<\/p>\n<\/article>\n<article id=\"ctr\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">CTR<\/span><\/p>\n<div>\n<h3>Click Through Rate<\/h3>\n<p><span class=\"htt-glossary-category\">Performance<\/span><\/p>\n<\/div>\n<\/div>\n<p>It measures the percentage of impressions that generate a click.<\/p>\n<p class=\"htt-formula\"><strong>CTR<\/strong> = (Clicks \/ Impressions) \u00d7 100<\/p>\n<\/article>\n<article id=\"cpa\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">CPA<\/span><\/p>\n<div>\n<h3>Cost Per Acquisition<\/h3>\n<p><span class=\"htt-glossary-category\">Performance<\/span><\/p>\n<\/div>\n<\/div>\n<p>It indicates the average cost required to obtain an acquisition or a conversion defined as relevant to the business.<\/p>\n<p class=\"htt-formula\"><strong>CPA<\/strong> = Cost \/ Acquisitions<\/p>\n<\/article>\n<article id=\"cpl\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">CPL<\/span><\/p>\n<div>\n<h3>Cost Per Lead<\/h3>\n<p><span class=\"htt-glossary-category\">Lead Generation<\/span><\/p>\n<\/div>\n<\/div>\n<p>It measures the average cost of generating a lead, for example a contact request or a form submission.<\/p>\n<p class=\"htt-formula\"><strong>CPL<\/strong> = Cost \/ Leads<\/p>\n<div class=\"htt-related\"><strong>Learn more:<\/strong><br \/>\n<a href=\"https:\/\/www.htt.it\/en\/lead-generation-increase-customers\/\">Lead Generation: how to turn contacts into opportunities<br \/>\n<\/a><\/div>\n<\/article>\n<article id=\"cvr\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">CVR<\/span><\/p>\n<div>\n<h3>Conversion Rate<\/h3>\n<p><span class=\"htt-glossary-category\">Performance<\/span><\/p>\n<\/div>\n<\/div>\n<p>The <strong>Conversion Rate<\/strong> indicates the percentage of users who complete the action considered to be a conversion.<\/p>\n<p class=\"htt-formula\"><strong>CVR<\/strong> = (Conversions \/ Users or sessions considered) \u00d7 100<\/p>\n<\/article>\n<article id=\"roas\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">ROAS<\/span><\/p>\n<div>\n<h3>Return on Advertising Spend<\/h3>\n<p><span class=\"htt-glossary-category\">Performance<\/span><\/p>\n<\/div>\n<\/div>\n<p><strong>ROAS<\/strong> measures the ratio between the revenue attributed to an advertising campaign and the corresponding media investment.<\/p>\n<p class=\"htt-formula\"><strong>ROAS<\/strong> = Attributed revenue \/ Advertising spend<\/p>\n<p>It is a very useful metric, but it is not the same as profit: it does not necessarily take into account margins, operating costs, returns, logistics, consulting fees and other business costs.<\/p>\n<div class=\"htt-related\"><strong>Learn more:<\/strong><br \/>\n<a href=\"https:\/\/www.htt.it\/en\/the-great-metrics-deception-roas-ai-and-real-profit\/\">The great metrics deception: ROAS, AI and real profit<br \/>\n<\/a><\/div>\n<\/article>\n<article id=\"mer\" class=\"htt-glossary-item htt-glossary-item--featured\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">MER<\/span><\/p>\n<div>\n<h3>Marketing Efficiency Ratio<\/h3>\n<p><span class=\"htt-glossary-category\">Performance<\/span><\/p>\n<\/div>\n<\/div>\n<p>The <strong>MER (Marketing Efficiency Ratio)<\/strong> measures the overall efficiency of marketing investment by comparing the total revenue generated by the company with its total marketing or advertising spend, depending on the scope used for the calculation.<\/p>\n<p class=\"htt-formula\"><strong>MER<\/strong> = Total revenue \/ Marketing spend<\/p>\n<p>Unlike <strong>ROAS<\/strong>, which attempts to measure the return attributed to a specific campaign, platform or advertising activity, MER looks at performance at a more aggregated level. For this reason, it is particularly widely used in ecommerce, where the purchase journey can involve multiple channels and attributing an individual conversion is becoming increasingly complex.<\/p>\n<p>For example, if an ecommerce business generates <strong>\u20ac500,000 in revenue<\/strong> while investing a total of <strong>\u20ac100,000 in marketing<\/strong>, its MER is <strong>5<\/strong>: for every euro invested, \u20ac5 in revenue is generated.<\/p>\n<div class=\"htt-related\"><strong>Remember:<\/strong><br \/>\nMER and ROAS answer different questions. ROAS evaluates the efficiency attributed to a specific advertising activity; MER provides a broader view of overall marketing efficiency.<\/div>\n<\/article>\n<article id=\"roi\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">ROI<\/span><\/p>\n<div>\n<h3>Return on Investment<\/h3>\n<p><span class=\"htt-glossary-category\">Business<\/span><\/p>\n<\/div>\n<\/div>\n<p><strong>ROI<\/strong> measures the economic return of an investment in relation to the capital invested. Unlike ROAS, it considers the economic result of the investment rather than only the revenue attributed to media spend.<\/p>\n<p class=\"htt-formula\"><strong>ROI<\/strong> = (Return \u2212 Investment) \/ Investment \u00d7 100<\/p>\n<\/article>\n<article id=\"cta\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">CTA<\/span><\/p>\n<div>\n<h3>Call To Action<\/h3>\n<p><span class=\"htt-glossary-category\">Conversion<\/span><\/p>\n<\/div>\n<\/div>\n<p>It is an explicit invitation for the user to take an action: make a purchase, contact the company, sign up, download content or request information.<\/p>\n<\/article>\n<article id=\"vtr\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">VTR<\/span><\/p>\n<div>\n<h3>View Through Rate<\/h3>\n<p><span class=\"htt-glossary-category\">Video Advertising<\/span><\/p>\n<\/div>\n<\/div>\n<p>It measures the ratio between completed views of an advertising video and the impressions or views considered according to the definition used by the platform.<\/p>\n<\/article>\n<article id=\"sov\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">SOV<\/span><\/p>\n<div>\n<h3>Share of Voice<\/h3>\n<p><span class=\"htt-glossary-category\">Brand<\/span><\/p>\n<\/div>\n<\/div>\n<p>It measures a brand&#8217;s share of visibility compared with its competitors within a specific market, channel or set of results.<\/p>\n<\/article>\n<\/section>\n<p><!-- ========================================================= ANALYTICS & MEASUREMENT ========================================================= --><\/p>\n<section id=\"measurement\" class=\"htt-glossary-section\" aria-labelledby=\"measurement-title\">\n<div class=\"htt-section-heading\"><span class=\"htt-section-number\">03<\/span><\/p>\n<div>\n<h2 id=\"measurement-title\">Analytics &amp; Measurement<\/h2>\n<p>Measurement is not just about counting clicks and conversions.<\/p>\n<\/div>\n<\/div>\n<article id=\"kpi\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">KPI<\/span><\/p>\n<div>\n<h3>Key Performance Indicator<\/h3>\n<p><span class=\"htt-glossary-category\">Measurement<\/span><\/p>\n<\/div>\n<\/div>\n<p><strong>KPIs<\/strong> are indicators used to measure progress towards an objective. Not all metrics are KPIs: a metric becomes a key performance indicator when it is directly linked to a decision or a business objective.<\/p>\n<div class=\"htt-related\"><strong>Learn more:<\/strong><br \/>\n<a href=\"https:\/\/www.htt.it\/en\/kpis-and-acronyms-by-business-role\/\">KPIs and acronyms for every business role<br \/>\n<\/a><\/div>\n<\/article>\n<article id=\"br\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">BR<\/span><\/p>\n<div>\n<h3>Bounce Rate<\/h3>\n<p><span class=\"htt-glossary-category\">Analytics<\/span><\/p>\n<\/div>\n<\/div>\n<p>In <strong>Google Analytics 4<\/strong>, Bounce Rate represents the percentage of sessions that are not considered engaged sessions and is therefore the inverse of Engagement Rate.<\/p>\n<p>A session is considered engaged when it meets the criteria defined by GA4 relating to duration, key events or the number of views.<\/p>\n<div class=\"htt-related\"><strong>Learn more:<\/strong><br \/>\n<a href=\"https:\/\/www.htt.it\/en\/ga4-ecommerce-setup-events-conversions-server-side-tracking\/\">GA4 for ecommerce: events, conversions and the data that matters<br \/>\n<\/a><\/div>\n<\/article>\n<article id=\"er\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">ER<\/span><\/p>\n<div>\n<h3>Engagement Rate<\/h3>\n<p><span class=\"htt-glossary-category\">Analytics<\/span><\/p>\n<\/div>\n<\/div>\n<p>In GA4, it represents the percentage of engaged sessions out of the total number of sessions. It is complementary to Bounce Rate.<\/p>\n<\/article>\n<article id=\"cac\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">CAC<\/span><\/p>\n<div>\n<h3>Customer Acquisition Cost<\/h3>\n<p><span class=\"htt-glossary-category\">Business<\/span><\/p>\n<\/div>\n<\/div>\n<p><strong>CAC<\/strong> measures the average cost of acquiring a new customer, taking into account the marketing and sales costs attributable to acquisition.<\/p>\n<p class=\"htt-formula\"><strong>CAC<\/strong> = Acquisition costs \/ New customers<\/p>\n<\/article>\n<article id=\"clv\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">CLV<\/span><\/p>\n<div>\n<h3>Customer Lifetime Value<\/h3>\n<p><span class=\"htt-glossary-category\">Business<\/span><\/p>\n<\/div>\n<\/div>\n<p><strong>Customer Lifetime Value<\/strong>, also referred to as LTV, estimates the economic value generated by a customer throughout their entire relationship with the company.<\/p>\n<p>Comparing CAC and CLV makes it possible to move beyond a view of performance limited to the individual conversion.<\/p>\n<div class=\"htt-related\"><strong>Learn more:<\/strong><br \/>\n<a href=\"https:\/\/www.htt.it\/en\/customer-lifetime-value-leaky-bucket-ai\/\">Maximizing Customer Lifetime Value<br \/>\n<\/a><\/div>\n<\/article>\n<article id=\"mmm\" class=\"htt-glossary-item htt-glossary-item--featured\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">MMM<\/span><\/p>\n<div>\n<h3>Marketing Mix Modeling<\/h3>\n<p><span class=\"htt-glossary-category\">Measurement<\/span><\/p>\n<\/div>\n<\/div>\n<p><strong>Marketing Mix Modeling<\/strong> uses statistical models to estimate how different marketing and market factors contribute to business results.<\/p>\n<p>Unlike attribution models based on an individual user&#8217;s journey, MMM works with aggregated data and can include online and offline advertising, promotions, seasonality, pricing and external variables.<\/p>\n<div class=\"htt-related\"><strong>Learn more:<\/strong><br \/>\n<a href=\"https:\/\/www.htt.it\/en\/marketing-mix-modeling-mmm-budget-allocation\/\">Marketing Mix Modeling: how to allocate your budget<br \/>\n<\/a><\/div>\n<\/article>\n<article id=\"mta\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">MTA<\/span><\/p>\n<div>\n<h3>Multi-Touch Attribution<\/h3>\n<p><span class=\"htt-glossary-category\">Measurement<\/span><\/p>\n<\/div>\n<\/div>\n<p><strong>Multi-Touch Attribution<\/strong> attempts to distribute the value of a conversion across the different touchpoints encountered by the user throughout the customer journey.<\/p>\n<p>The fragmentation of customer journeys, tracking limitations and privacy constraints, however, make it increasingly difficult to reconstruct individual behavior perfectly.<\/p>\n<div class=\"htt-related\"><strong>Learn more:<\/strong><br \/>\n<a href=\"https:\/\/www.htt.it\/en\/marketing-attribution-mta-lift-tests-marketing-mix-modeling\/\">The Holy Grail of attribution: MTA, Lift Tests and MMM<br \/>\n<\/a><\/div>\n<\/article>\n<article id=\"incrementality\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">INC<\/span><\/p>\n<div>\n<h3>Incrementality<\/h3>\n<p><span class=\"htt-glossary-category\">Measurement<\/span><\/p>\n<\/div>\n<\/div>\n<p><strong>Incrementality<\/strong> attempts to answer a different question from attribution: how many of the conversions observed were actually caused by the marketing activity, and how many would have occurred anyway?<\/p>\n<p>Lift tests and controlled experiments are some of the tools used to estimate this incremental effect.<\/p>\n<\/article>\n<\/section>\n<p><!-- ========================================================= ADTECH & DATA ========================================================= --><\/p>\n<section id=\"adtech\" class=\"htt-glossary-section\" aria-labelledby=\"adtech-title\">\n<div class=\"htt-section-heading\"><span class=\"htt-section-number\">04<\/span><\/p>\n<div>\n<h2 id=\"adtech-title\">AdTech, Data &amp; Privacy<\/h2>\n<p>The technologies that manage advertising, data, consent and audience activation.<\/p>\n<\/div>\n<\/div>\n<article id=\"rtb\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">RTB<\/span><\/p>\n<div>\n<h3>Real-Time Bidding<\/h3>\n<p><span class=\"htt-glossary-category\">Programmatic<\/span><\/p>\n<\/div>\n<\/div>\n<p>A mechanism through which advertising impressions are bought and sold via automated auctions that take place in real time.<\/p>\n<div class=\"htt-related\"><strong>Learn more:<\/strong><br \/>\n<a href=\"https:\/\/www.htt.it\/en\/programmatic-advertising\/\">Programmatic Advertising<\/a><\/div>\n<\/article>\n<article id=\"dsp\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">DSP<\/span><\/p>\n<div>\n<h3>Demand-Side Platform<\/h3>\n<p><span class=\"htt-glossary-category\">Programmatic<\/span><\/p>\n<\/div>\n<\/div>\n<p>A platform used by advertisers to automatically purchase and optimize advertising inventory from different sources.<\/p>\n<\/article>\n<article id=\"ssp\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">SSP<\/span><\/p>\n<div>\n<h3>Supply-Side Platform<\/h3>\n<p><span class=\"htt-glossary-category\">Programmatic<\/span><\/p>\n<\/div>\n<\/div>\n<p>A platform used by publishers to make their advertising inventory available and automatically monetize it.<\/p>\n<\/article>\n<article id=\"dmp\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">DMP<\/span><\/p>\n<div>\n<h3>Data Management Platform<\/h3>\n<p><span class=\"htt-glossary-category\">Data<\/span><\/p>\n<\/div>\n<\/div>\n<p>A <strong>DMP<\/strong> collects and organizes audience data to create segments that can be used primarily for advertising.<\/p>\n<p>Historically very important in programmatic advertising, its role has diminished with the evolution of privacy regulations, the progressive reduction of third-party identifiers and the growing importance of first-party data.<\/p>\n<\/article>\n<article id=\"cdp\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">CDP<\/span><\/p>\n<div>\n<h3>Customer Data Platform<\/h3>\n<p><span class=\"htt-glossary-category\">Data<\/span><\/p>\n<\/div>\n<\/div>\n<p>A <strong>Customer Data Platform<\/strong> collects and unifies first-party data from different touchpoints to build persistent customer profiles that can be used by marketing, analytics and other business systems.<\/p>\n<\/article>\n<article id=\"crm\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">CRM<\/span><\/p>\n<div>\n<h3>Customer Relationship Management<\/h3>\n<p><span class=\"htt-glossary-category\">Data<\/span><\/p>\n<\/div>\n<\/div>\n<p><strong>CRM<\/strong> refers to the processes and technologies used to manage relationships with prospects and customers, organizing information, sales opportunities, communications and sales activities.<\/p>\n<\/article>\n<article id=\"cmp\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">CMP<\/span><\/p>\n<div>\n<h3>Consent Management Platform<\/h3>\n<p><span class=\"htt-glossary-category\">Privacy<\/span><\/p>\n<\/div>\n<\/div>\n<p>A <strong>CMP<\/strong> is a platform used to collect, record and manage users&#8217; consent preferences regarding cookies and other data processing technologies.<\/p>\n<\/article>\n<article id=\"first-party-data\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">1P DATA<\/span><\/p>\n<div>\n<h3>First-Party Data<\/h3>\n<p><span class=\"htt-glossary-category\">Data<\/span><\/p>\n<\/div>\n<\/div>\n<p><strong>First-party data<\/strong> is data collected directly by a company through its own relationships and digital properties: website, ecommerce, CRM, apps, loyalty programs, customer service and other proprietary touchpoints.<\/p>\n<\/article>\n<article id=\"sst\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">SST<\/span><\/p>\n<div>\n<h3>Server-Side Tracking<\/h3>\n<p><span class=\"htt-glossary-category\">Measurement<\/span><\/p>\n<\/div>\n<\/div>\n<p><strong>Server-side tracking<\/strong> moves part of the data collection and management process from the user&#8217;s browser to a server infrastructure controlled by the company.<\/p>\n<p>It does not eliminate privacy and consent obligations, but it can increase control, governance and the quality of data flows.<\/p>\n<div class=\"htt-related\"><strong>Learn more:<\/strong><br \/>\n<a href=\"https:\/\/www.htt.it\/en\/the-importance-of-server-side-tracking-in-online-data-analysis\/\">Server-Side Tracking: what it is and when it is needed<br \/>\n<\/a><\/div>\n<\/article>\n<\/section>\n<p><!-- ========================================================= AI, PROVENANCE & AGENTIC COMMERCE ========================================================= --><\/p>\n<section id=\"agentic\" class=\"htt-glossary-section\" aria-labelledby=\"agentic-title\">\n<div class=\"htt-section-heading\"><span class=\"htt-section-number\">05<\/span><\/p>\n<div>\n<h2 id=\"agentic-title\">AI, Content Provenance &amp; Agentic Commerce<\/h2>\n<p>Emerging terms that are changing content, ecommerce and interactions between companies and AI agents.<\/p>\n<\/div>\n<\/div>\n<article id=\"c2pa\" class=\"htt-glossary-item htt-glossary-item--featured\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">C2PA<\/span><\/p>\n<div>\n<h3>Coalition for Content Provenance and Authenticity<\/h3>\n<p><span class=\"htt-glossary-category\">Content Provenance<\/span><\/p>\n<\/div>\n<\/div>\n<p><strong>C2PA<\/strong> stands for the Coalition for Content Provenance and Authenticity and gives its name to an open technical standard for associating digital content with verifiable information about its provenance.<\/p>\n<p>Through cryptographically signed manifests, information about the creation and modifications of content can be recorded, building a kind of <strong>digital passport for media<\/strong>.<\/p>\n<p>C2PA does not determine whether content is true or false: it makes it possible to verify the integrity and provenance of the information declared in the manifest.<\/p>\n<div class=\"htt-related\"><strong>Learn more:<\/strong><br \/>\n<a href=\"https:\/\/www.htt.it\/en\/c2pa-content-credentials\/\"><br \/>\nWhat is C2PA: the digital passport for content<br \/>\n<\/a><br \/>\n<span aria-hidden=\"true\"> \u00b7 <\/span><br \/>\n<a href=\"https:\/\/www.htt.it\/en\/ai-watermarking-claude-gemini-chatgpt-c2pa-synthid\/\">AI Watermarking, C2PA and SynthID<br \/>\n<\/a><\/div>\n<\/article>\n<article id=\"mcp\" class=\"htt-glossary-item htt-glossary-item--featured\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">MCP<\/span><\/p>\n<div>\n<h3>Model Context Protocol<\/h3>\n<p><span class=\"htt-glossary-category\">AI &amp; Agents<\/span><\/p>\n<\/div>\n<\/div>\n<p>The <strong>Model Context Protocol (MCP)<\/strong> is an open standard that allows artificial intelligence applications to connect to external tools, data and services in a standardized way.<\/p>\n<p>The goal is to avoid different proprietary integrations for every combination of AI model and external system. Through MCP, an AI application can, for example, access databases, documents, APIs and business tools using a common protocol.<\/p>\n<p>MCP is therefore one of the elements of the emerging <strong>AI Agent<\/strong> infrastructure: it allows a model to go beyond the information available in its own context and interact with external resources and tools.<\/p>\n<\/article>\n<article id=\"a2a\" class=\"htt-glossary-item\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">A2A<\/span><\/p>\n<div>\n<h3>Agent2Agent Protocol<\/h3>\n<p><span class=\"htt-glossary-category\">AI &amp; Agents<\/span><\/p>\n<\/div>\n<\/div>\n<p><strong>A2A, Agent2Agent Protocol<\/strong>, is an open protocol designed to allow different artificial intelligence agents to communicate and collaborate with one another.<\/p>\n<p>While MCP primarily facilitates connections between an AI application and tools or data sources, A2A addresses a different problem: enabling <strong>autonomous agents developed on different platforms to exchange information, coordinate activities and collaborate on the execution of a task<\/strong>.<\/p>\n<p>It is an important concept in the evolution towards ecosystems in which there is not necessarily a single AI assistant, but rather multiple specialized agents cooperating with one another.<\/p>\n<\/article>\n<article id=\"acp\" class=\"htt-glossary-item htt-glossary-item--featured\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">ACP<\/span><\/p>\n<div>\n<h3>Agentic Commerce Protocol<\/h3>\n<p><span class=\"htt-glossary-category\">Agentic Commerce<\/span><\/p>\n<\/div>\n<\/div>\n<p>The <strong>Agentic Commerce Protocol<\/strong> is an open standard developed by OpenAI together with Stripe to enable AI agents and ecommerce systems to communicate throughout the purchasing process.<\/p>\n<p>It enables operations such as checkout and payment to be managed in a standardized way while keeping the merchant responsible for the sale, order fulfillment and customer relationship.<\/p>\n<p>ACP is the foundation of agentic commerce experiences designed to enable users to move from product discovery to transaction directly through an AI interface.<\/p>\n<div class=\"htt-related\"><strong>Learn more:<\/strong><br \/>\n<a href=\"https:\/\/www.htt.it\/en\/agentic-ecommerce-acp-ucp-shopify-ai-commerce\/\">Agentic ecommerce: ACP, UCP and Amazon<br \/>\n<\/a><\/div>\n<\/article>\n<article id=\"ucp\" class=\"htt-glossary-item htt-glossary-item--featured\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">UCP<\/span><\/p>\n<div>\n<h3>Universal Commerce Protocol<\/h3>\n<p><span class=\"htt-glossary-category\">Agentic Commerce<\/span><\/p>\n<\/div>\n<\/div>\n<p>The <strong>Universal Commerce Protocol<\/strong> is an open standard for agentic commerce developed by Google together with Shopify and other companies in the retail ecosystem.<\/p>\n<p>The goal is to create a common language through which AI agents, merchants and payment systems can manage the entire commerce journey, from product discovery to checkout and post-purchase activities.<\/p>\n<p>UCP can manage capabilities such as catalog, availability, pricing, cart, discounts, fulfillment and orders, avoiding the need for each merchant to build a completely different integration for every AI agent.<\/p>\n<div class=\"htt-related\"><strong>Learn more:<\/strong><br \/>\n<a href=\"https:\/\/www.htt.it\/en\/shopify-llms-txt-agents-md-agentic-commerce-guide\/\">Shopify agents.md, llms.txt and UCP<br \/>\n<\/a><br \/>\n<span aria-hidden=\"true\"> \u00b7 <\/span><br \/>\n<a href=\"https:\/\/www.htt.it\/en\/agentic-ecommerce-acp-ucp-shopify-ai-commerce\/\">Agentic ecommerce: ACP, UCP and Amazon<br \/>\n<\/a><\/div>\n<\/article>\n<article id=\"ap2\" class=\"htt-glossary-item htt-glossary-item--featured\">\n<div class=\"htt-glossary-heading\"><span class=\"htt-glossary-acronym\">AP2<\/span><\/p>\n<div>\n<h3>Agent Payments Protocol<\/h3>\n<p><span class=\"htt-glossary-category\">Agentic Commerce<\/span><\/p>\n<\/div>\n<\/div>\n<p>The <strong>Agent Payments Protocol (AP2)<\/strong> is an open protocol designed to enable payments made through artificial intelligence agents in an interoperable and verifiable way.<\/p>\n<p>The issue becomes particularly important in agentic commerce: when an AI agent does not simply recommend a product but can participate in the transaction, it is necessary to establish <strong>what the user has authorized, which conditions must be met and how to demonstrate that the operation carried out by the agent corresponds to the user&#8217;s intentions<\/strong>.<\/p>\n<p>AP2 therefore introduces mechanisms designed to create a verifiable relationship between the user, agent, merchant and payment systems.<\/p>\n<p>It is part of the same ecosystem in which standards such as <strong>UCP<\/strong> and <strong>ACP<\/strong> are emerging, but specifically addresses the authorization and payment layer.<\/p>\n<\/article>\n<aside class=\"htt-concept-box\" aria-labelledby=\"agentic-ecosystem-title\">\n<h3 id=\"agentic-ecosystem-title\">A new stack for AI agents<\/h3>\n<p>As AI Agents evolve, different protocols are emerging to solve different problems: access to tools, communication between agents, commerce and payments.<\/p>\n<div class=\"htt-protocol-grid\">\n<div class=\"htt-protocol-card\"><strong>MCP<\/strong><br \/>\nAgent \u2194 tools and data<\/div>\n<div class=\"htt-protocol-card\"><strong>A2A<\/strong><br \/>\nAgent \u2194 Agent<\/div>\n<div class=\"htt-protocol-card\"><strong>ACP \/ UCP<\/strong><br \/>\nAgent \u2194 Commerce<\/div>\n<div class=\"htt-protocol-card\"><strong>AP2<\/strong><br \/>\nAgent \u2194 Payments<\/div>\n<\/div>\n<p class=\"htt-concept-note\">They are not necessarily competing protocols: they address different layers of the infrastructure required for AI agents to interact with systems, companies and other agents.<\/p>\n<\/aside>\n<\/section>\n<p><!-- ========================================================= CONCLUSIONS ========================================================= --><\/p>\n<section class=\"htt-glossary-conclusion\" aria-labelledby=\"conclusion-title\">\n<h2 id=\"conclusion-title\">The glossary will continue to evolve<\/h2>\n<p>Digital Marketing has always been a field characterized by new tools and new acronyms, but the current evolution goes deeper: the very way in which people, platforms and companies find and exchange information is changing.<\/p>\n<p>SEO, advertising and analytics remain fundamental, but today they coexist with generative search systems, more sophisticated attribution models, first-party data, content provenance standards and protocols that enable AI agents to interact directly with ecommerce platforms.<\/p>\n<p>For this reason, knowing an acronym does not simply mean remembering what it stands for. It means understanding <strong>what problem it solves, which ecosystem it is used in and what impact it can have on marketing and business decisions<\/strong>.<\/p>\n<\/section>\n<p><!-- ========================================================= FAQ ========================================================= --><\/p>\n<section id=\"faq\" class=\"htt-faq\" aria-labelledby=\"faq-title\">\n<h2 id=\"faq-title\">Frequently asked questions about the Digital Marketing glossary<\/h2>\n<details class=\"htt-faq-item\">\n<summary>What is the difference between SEO, AEO and GEO?<\/summary>\n<div class=\"htt-faq-content\">\n<p>SEO focuses on visibility in search engines, AEO on the ability to provide answers that can be easily used by answer engines, and GEO on visibility within search systems based on generative artificial intelligence. In practice, the three areas overlap significantly and share many best practices.<\/p>\n<\/div>\n<\/details>\n<details class=\"htt-faq-item\">\n<summary>Will GEO replace SEO?<\/summary>\n<div class=\"htt-faq-content\">\n<p>No. Generative search systems still use crawling, indexing, ranking and information retrieval infrastructures. For Google in particular, SEO best practices also remain the foundation for visibility within generative search experiences.<\/p>\n<\/div>\n<\/details>\n<details class=\"htt-faq-item\">\n<summary>What is the difference between ROI and ROAS?<\/summary>\n<div class=\"htt-faq-content\">\n<p>ROAS compares revenue attributed to advertising with advertising spend. ROI, on the other hand, measures the economic return on an investment by considering the result in relation to the costs incurred. A campaign can therefore have a high ROAS without necessarily being profitable.<\/p>\n<\/div>\n<\/details>\n<details class=\"htt-faq-item\">\n<summary>What is the difference between CAC and CPA?<\/summary>\n<div class=\"htt-faq-content\">\n<p>CPA measures the cost of a specific advertising acquisition or conversion, while CAC attempts to represent the overall cost required to acquire a new customer, including, depending on the model used, multiple marketing and sales components.<\/p>\n<\/div>\n<\/details>\n<details class=\"htt-faq-item\">\n<summary>What are ACP and UCP?<\/summary>\n<div class=\"htt-faq-content\">\n<p>ACP, Agentic Commerce Protocol, and UCP, Universal Commerce Protocol, are standards created to enable AI agents and ecommerce systems to communicate and manage commerce processes. ACP was developed by OpenAI with Stripe; UCP was developed by Google together with Shopify and other companies in the retail ecosystem.<\/p>\n<\/div>\n<\/details>\n<details class=\"htt-faq-item\">\n<summary>What is C2PA used for?<\/summary>\n<div class=\"htt-faq-content\">\n<p>C2PA makes it possible to associate digital content with verifiable information about its provenance and the transformations that have been made to it. It does not certify that content is true, but it makes it possible to verify the integrity of the declared provenance information.<\/p>\n<\/div>\n<\/details>\n<details class=\"htt-faq-item\">\n<summary>Why have MMM and incrementality become more important?<\/summary>\n<div class=\"htt-faq-content\">\n<p>Privacy, cross-device journeys, closed platforms and signal loss make it increasingly difficult to perfectly attribute every conversion to a single touchpoint. MMM, lift tests and incrementality analysis make it possible to evaluate marketing effectiveness using approaches that complement traditional individual-level attribution.<\/p>\n<\/div>\n<\/details>\n<\/section>\n<p><!-- ========================================================= BIBLIOGRAPHY ========================================================= --><\/p>\n<section class=\"htt-bibliography\" aria-labelledby=\"bibliografia-title\">\n<h2 id=\"bibliografia-title\">Sources and further reading<\/h2>\n<p>The definitions in this glossary have been updated with reference to the official documentation of the industry&#8217;s main standards and platforms.<\/p>\n<div class=\"htt-bibliography-grid\">\n<article class=\"htt-bibliography-card\">\n<h3>Google Search Central<\/h3>\n<p><strong>Optimization for generative AI features in Google Search<\/strong><\/p>\n<p>Official Google documentation on SEO, AEO, GEO, RAG and how generative search works.<\/p>\n<p><a href=\"https:\/\/developers.google.com\/search\/docs\/fundamentals\/ai-optimization-guide?hl=it\" target=\"_blank\" rel=\"noopener noreferrer\"><br \/>\nView the documentation<br \/>\n<\/a><\/p>\n<\/article>\n<article class=\"htt-bibliography-card\">\n<h3>Google \/ Universal Commerce Protocol<\/h3>\n<p><strong>Universal Commerce Protocol<\/strong><\/p>\n<p>Documentation relating to the open UCP standard for agentic commerce.<\/p>\n<p><a href=\"https:\/\/developers.google.com\/merchant\/ucp\" target=\"_blank\" rel=\"noopener noreferrer\"><br \/>\nView the documentation<br \/>\n<\/a><\/p>\n<\/article>\n<article class=\"htt-bibliography-card\">\n<h3>OpenAI<\/h3>\n<p><strong>Agentic Commerce Protocol<\/strong><\/p>\n<p>An introduction to Instant Checkout and the ACP standard developed for commerce through AI agents.<\/p>\n<p><a href=\"https:\/\/openai.com\/index\/buy-it-in-chatgpt\/\" target=\"_blank\" rel=\"noopener noreferrer\"><br \/>\nRead more<br \/>\n<\/a><\/p>\n<\/article>\n<article class=\"htt-bibliography-card\">\n<h3>C2PA<\/h3>\n<p><strong>Technical Specification<\/strong><\/p>\n<p>Official specifications for the standard covering the provenance and authenticity of digital content.<\/p>\n<p><a href=\"https:\/\/c2pa.org\/specifications\/\" target=\"_blank\" rel=\"noopener noreferrer\"><br \/>\nView the specifications<br \/>\n<\/a><\/p>\n<\/article>\n<article class=\"htt-bibliography-card\">\n<h3>Google Analytics<\/h3>\n<p><strong>Analytics Help<\/strong><\/p>\n<p>Official documentation covering engagement rate, bounce rate, events and GA4 metrics.<\/p>\n<p><a href=\"https:\/\/support.google.com\/analytics\/\" target=\"_blank\" rel=\"noopener noreferrer\"><br \/>\nView the documentation<br \/>\n<\/a><\/p>\n<\/article>\n<article class=\"htt-bibliography-card\">\n<h3>IAB<\/h3>\n<p><strong>Digital Advertising Standards<\/strong><\/p>\n<p>Standards, definitions and best practices for digital advertising, programmatic advertising and measurement.<\/p>\n<p><a href=\"https:\/\/www.iab.com\/\" target=\"_blank\" rel=\"noopener noreferrer\"><br \/>\nVisit IAB<br \/>\n<\/a><\/p>\n<\/article>\n<\/div>\n<\/section>\n<\/article>\n        <\/div>\n    <\/div>\n<\/section>\n\n\n\n<style data-wp-block-html=\"css\">\n<style>\n\/* =========================================================\n   HT&T - GLOSSARIO DIGITAL MARKETING\n   CSS COMPLETO\n========================================================= *\/\n\n:root {\n    --htt-text: #1f2933;\n    --htt-muted: #5f6b76;\n    --htt-border: #dfe5ea;\n    --htt-soft: #f7f9fb;\n    --htt-soft-2: #eef3f7;\n    --htt-accent: #003fc7;\n    --htt-accent-soft: #f0f4f8;\n    --htt-warning-bg: #fff8e7;\n    --htt-warning-border: #ead39a;\n    --htt-highlight-bg: #f4f7fa;\n}\n\n.htt-glossary {\n    color: #1f2933;\n    line-height: 1.7;\n}\n\n.htt-glossary-item {\n    margin: 0 0 18px !important;\n    padding: 25px 28px !important;\n    border: 1px solid #dfe5ea !important;\n    border-radius: 12px !important;\n    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border-color: var(--nav-color) !important;\n    background: var(--nav-soft);\n}\n\n\/* =========================================================\n   INTRO \/ HERO\n========================================================= *\/\n\n.htt-glossary-hero {\n    margin-bottom: 34px;\n    padding: 36px 0 30px;\n    border-bottom: 1px solid var(--htt-border);\n}\n\n.htt-eyebrow {\n    margin: 0 0 10px;\n    color: var(--htt-accent);\n    font-size: .82rem;\n    font-weight: 700;\n    line-height: 1.4;\n    letter-spacing: .08em;\n    text-transform: uppercase;\n}\n\n.htt-glossary-hero h1 {\n    max-width: 980px;\n    margin: 0 0 22px;\n    color: var(--htt-text);\n    font-size: clamp(2rem, 4vw, 3.4rem);\n    font-weight: 700;\n    line-height: 1.08;\n    letter-spacing: -.035em;\n}\n\n.htt-glossary-hero p {\n    max-width: 980px;\n}\n\n.htt-glossary-hero .htt-lead {\n    margin-top: 0;\n    font-size: 1.2rem;\n    line-height: 1.65;\n}\n\n\n\/* =========================================================\n   NAVIGAZIONE CATEGORIE\n========================================================= *\/\n\n.htt-glossary-nav {\n    display: grid;\n    grid-template-columns: repeat(5, minmax(0, 1fr));\n    gap: 12px;\n    margin: 32px 0 60px;\n}\n\n.htt-glossary-nav a {\n    display: flex;\n    min-width: 0;\n    min-height: 112px;\n    flex-direction: column;\n    justify-content: space-between;\n    padding: 18px;\n    border: 1px solid var(--htt-border);\n    border-radius: 10px;\n    background: #fff;\n    color: var(--htt-text);\n    text-decoration: none;\n    box-shadow: 0 1px 2px rgba(31, 41, 51, .03);\n    transition:\n        transform .18s ease,\n        border-color .18s ease,\n        box-shadow .18s ease;\n}\n\n.htt-glossary-nav a:hover {\n    transform: translateY(-2px);\n    border-color: var(--htt-accent);\n    box-shadow: 0 7px 20px rgba(31, 41, 51, .07);\n}\n\n.htt-glossary-nav a:focus-visible {\n    border-color: 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color: var(--htt-text);\n    font-size: clamp(1.65rem, 3vw, 2.35rem);\n    font-weight: 700;\n    line-height: 1.15;\n    letter-spacing: -.02em;\n}\n\n.htt-section-heading p {\n    margin: 7px 0 0;\n    color: var(--htt-muted);\n    font-size: .98rem;\n}\n\n\n\/* =========================================================\n   CARD GLOSSARIO\n========================================================= *\/\n\n.htt-glossary-item {\n    position: relative;\n    margin: 0 0 18px;\n    padding: 25px 28px;\n    overflow: hidden;\n    border: 1px solid var(--htt-border);\n    border-radius: 12px;\n    background: #fff;\n    box-shadow: 0 1px 2px rgba(31, 41, 51, .025);\n    scroll-margin-top: 30px;\n}\n\n.htt-glossary-item--featured {\n    border-left: 4px solid var(--htt-accent);\n    background:\n        linear-gradient(\n            90deg,\n            var(--htt-accent-soft) 0,\n            rgba(240, 244, 248, .55) 18%,\n            #fff 48%\n        );\n}\n\n.htt-glossary-heading {\n    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14px;\n}\n\n.htt-glossary-item p:last-child {\n    margin-bottom: 0;\n}\n\n\n\/* =========================================================\n   FORMULE\n========================================================= *\/\n\n.htt-formula {\n    display: inline-block;\n    max-width: 100%;\n    margin: 5px 0 15px !important;\n    padding: 9px 14px;\n    overflow-wrap: anywhere;\n    border: 1px solid var(--htt-border);\n    border-radius: 6px;\n    background: var(--htt-soft-2);\n    color: var(--htt-text);\n    font-family:\n        ui-monospace,\n        SFMono-Regular,\n        Menlo,\n        Monaco,\n        Consolas,\n        \"Liberation Mono\",\n        monospace;\n    font-size: .9rem;\n    line-height: 1.5;\n}\n\n\n\/* =========================================================\n   LINK DI APPROFONDIMENTO\n========================================================= *\/\n\n.htt-related {\n    margin-top: 19px;\n    padding: 13px 16px;\n    border-left: 3px solid var(--htt-accent);\n    border-radius: 0 6px 6px 0;\n    background: var(--htt-soft);\n    color: var(--htt-text);\n    font-size: .9rem;\n    line-height: 1.55;\n}\n\n.htt-related strong {\n    margin-right: 4px;\n}\n\n.htt-related a {\n    font-weight: 600;\n}\n\n\n\/* =========================================================\n   BOX CONCETTUALI\n========================================================= *\/\n\n.htt-concept-box {\n    margin: 30px 0;\n    padding: 30px;\n    border: 1px solid var(--htt-border);\n    border-radius: 12px;\n    background: var(--htt-highlight-bg);\n}\n\n.htt-concept-box h3 {\n    margin: 0 0 12px;\n    color: var(--htt-text);\n    font-size: 1.4rem;\n    font-weight: 700;\n    line-height: 1.3;\n}\n\n.htt-concept-box > p:first-of-type {\n    margin-top: 0;\n}\n\n.htt-concept-box > p:last-child {\n    margin-bottom: 0;\n}\n\n\n\/* =========================================================\n   SEO \u2192 AEO \u2192 GEO\n========================================================= *\/\n\n.htt-evolution {\n    display: flex;\n    align-items: stretch;\n    justify-content: center;\n    gap: 12px;\n    margin: 25px 0;\n}\n\n.htt-evolution > div {\n    display: flex;\n    min-width: 0;\n    min-height: 105px;\n    flex: 1 1 0;\n    flex-direction: column;\n    align-items: center;\n    justify-content: center;\n    padding: 18px;\n    border: 1px solid var(--htt-border);\n    border-radius: 8px;\n    background: #fff;\n    text-align: center;\n}\n\n.htt-evolution strong {\n    display: block;\n    color: var(--htt-accent);\n    font-size: 1.2rem;\n    line-height: 1.25;\n}\n\n.htt-evolution > div span {\n    display: block;\n    margin-top: 6px;\n    color: var(--htt-muted);\n    font-size: .86rem;\n    line-height: 1.4;\n}\n\n.htt-arrow {\n    display: flex;\n    flex: 0 0 auto;\n    align-items: center;\n    justify-content: center;\n    color: var(--htt-accent);\n    font-size: 1.15rem;\n    font-weight: 700;\n}\n\n\n\/* =========================================================\n   MCP \/ A2A \/ ACP-UCP \/ AP2\n========================================================= *\/\n\n.htt-protocol-grid {\n    display: grid;\n    grid-template-columns: repeat(4, minmax(0, 1fr));\n    gap: 12px;\n    margin: 25px 0;\n}\n\n.htt-protocol-card {\n    display: flex;\n    min-width: 0;\n    min-height: 120px;\n    flex-direction: column;\n    align-items: center;\n    justify-content: center;\n    padding: 20px 15px;\n    border: 1px solid var(--htt-border);\n    border-radius: 8px;\n    background: #fff;\n    text-align: center;\n}\n\n.htt-protocol-card strong {\n    display: block;\n    margin-bottom: 7px;\n    color: var(--htt-accent);\n    font-size: 1.3rem;\n    font-weight: 800;\n    line-height: 1.2;\n}\n\n.htt-protocol-card span {\n    display: block;\n    color: var(--htt-muted);\n    font-size: .85rem;\n    line-height: 1.4;\n}\n\n.htt-concept-note {\n    margin-bottom: 0 !important;\n    color: var(--htt-muted);\n    font-size: .92rem;\n}\n\n\n\/* =========================================================\n   CMP VS CONSENT MODE\n========================================================= *\/\n\n.htt-compare-grid {\n    display: grid;\n    grid-template-columns: repeat(2, minmax(0, 1fr));\n    gap: 14px;\n    margin: 22px 0;\n}\n\n.htt-compare-grid > div {\n    min-width: 0;\n    padding: 20px;\n    border: 1px solid var(--htt-border);\n    border-radius: 8px;\n    background: #fff;\n}\n\n.htt-compare-grid strong {\n    display: block;\n    margin-bottom: 7px;\n    color: var(--htt-accent);\n    font-size: 1.1rem;\n    font-weight: 700;\n}\n\n.htt-compare-grid span {\n    display: block;\n    color: var(--htt-muted);\n    font-size: .9rem;\n    line-height: 1.55;\n}\n\n\n\/* =========================================================\n   CONCLUSIONE\n========================================================= *\/\n\n.htt-glossary .htt-glossary-conclusion,\n.htt-glossary-conclusion 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