Reference
Clear, cite-able definitions of the essential terms behind modern marketing — from AI Search Optimization to structured data to share of model. Written to be as useful for humans as it is easy for AI engines to cite.
The practice of structuring content so AI answer engines — ChatGPT, Perplexity, Google AI Overviews, Gemini — can extract and cite it directly in response to a user query. AEO overlaps significantly with Generative Engine Optimization (GEO). Both prioritize citation inside AI-generated answers over traditional keyword ranking.
The practice of structuring your website, content, third-party citations, and digital authority signals so that AI engines like ChatGPT, Perplexity, Google AI Overviews, Gemini, Microsoft Copilot, Meta AI, and Claude cite and recommend your brand when users ask them questions. Also called Generative Engine Optimization (GEO) or Answer Engine Optimization (AEO). See our AI Search Optimization services page for a working overview.
The presence of your website in Bing's search index. Critical for AI Search Optimization because ChatGPT's live web search runs on Bing, not Google. A brand invisible to Bing is invisible to ChatGPT's real-time answers, regardless of Google rankings. Bing Webmaster Tools is the free platform for verifying indexation, submitting sitemaps, and monitoring performance.
A conversational AI product by OpenAI launched in November 2022. Its live web search feature is powered by Bing's search index, making Bing visibility essential for brand citation in ChatGPT answers. As of 2026, ChatGPT is the largest AI chat product by weekly active users and one of the primary surfaces where brand recommendations are formed.
The 3-5 core topic themes that define a brand's content strategy. Every piece of content should support one of the established pillars. Effective pillars are specific enough to be defensible (not "marketing") and broad enough to sustain months of content (not "the Q3 promo").
The formal name for AI Search Optimization, coined to distinguish it from traditional SEO. GEO focuses on being cited inside AI-generated answers rather than ranked on traditional search results pages. The core success metric is share of model — how often your brand is named compared to competitors across AI engines.
Google's AI-generated summary displayed at the top of certain search results pages, launched in 2024. Overviews draw from Google's search index, its knowledge graph, and structured data on ranked pages. Being cited in an Overview typically requires strong existing SEO plus structured data that answers the query directly.
The date up to which an AI model's training data was collected. Information about events, products, or brands created after the cutoff is unknown to the model unless retrieved through live web search. For brands, this means AI visibility has two components: being present in the training data (long-term reputation) and being findable in live search (Bing indexation for ChatGPT, Google indexation for AI Overviews).
A conversational AI search engine that generates answers with visible citations to source content. Notable for drawing roughly 47% of its citations from Reddit and community sources, making Reddit presence a meaningful signal for Perplexity visibility. Popular with technical researchers and increasingly with mainstream users.
The practice of improving a website's ranking in traditional search engine results pages (SERPs), primarily through content quality, technical optimization, and backlinks. SEO and GEO are complementary, not opposites — solid SEO is the foundation for GEO, but the tactics and success metrics differ meaningfully.
The percentage of relevant AI-generated answers in which your brand is named compared to competitors. The core success metric for AI Search Optimization. A brand with 30% share of model across a category is named in roughly one in three relevant AI answers. Measured through repeated prompt testing across major engines.
Content marked up in a standardized format (typically JSON-LD Schema.org) that helps search engines and AI engines understand what a page is about and extract information accurately. Common types include Organization, Product, Article, FAQPage, and Review schemas. Structured data is one of the strongest signals for both SEO and GEO.
Mentions of your brand on external websites, publications, directories, review sites, or user-generated content platforms. The single strongest signal for AI Search Optimization. Your own website content doesn't count as a citation of yourself. Building third-party citations systematically — through press coverage, guest content, directory listings, and community presence — is the operational core of GEO.
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