The GEO Glossary
Definition-first explanations of every term in the AI search visibility stack. Each entry practices what it preaches: the answer is in the first sentence.
What is GPTBot?
GPTBot is OpenAI's web crawler for content that may be used to improve its generative AI models. It is distinct from OAI-SearchBot, which OpenAI docum…
What is ClaudeBot?
ClaudeBot is Anthropic's web crawler, identified by the user-agent string ClaudeBot, used to collect publicly available content for training and updat…
What is llms.txt?
llms.txt is a voluntary proposal, stored at yourdomain.com/llms.txt, for publishing a curated Markdown map of important site pages. A service may choo…
What is GEO (Generative Engine Optimization)?
Generative Engine Optimization (GEO) is an industry term for applying search, accessibility, evidence, entity, and measurement practices to generative…
What is AEO (Answer Engine Optimization)?
Answer Engine Optimization (AEO) is the practice of structuring content to appear as direct answers in search engines' featured snippets, knowledge pa…
What is AI Search Visibility?
AI search visibility is an observed rate: how often a brand or page is mentioned, recommended, or cited across a defined prompt set, engine set, locat…
What is Passage-Level Indexing?
Passage ranking is Google's ability to identify that an individual section of a page is relevant to a query. Google clarified that it still indexes th…
What is AI Crawlability?
AI crawlability describes whether a particular crawler or retrieval service can directly fetch and parse a website's content. A block can prevent that…
What is Citation Readiness?
Citation readiness is CiteFuel's editorial term for qualities that can make a passage easier to understand and verify, such as a direct answer, an exp…
What is IndexNow?
IndexNow is an open protocol that lets websites instantly notify participating search engines when URLs are created, updated, or deleted — replacing t…
What is Knowledge Graph Entity?
A knowledge graph entity is a machine-readable record representing a real-world thing — a company, person, product, or concept — with a stable identit…
What is AI Overview?
An AI Overview is a generative feature in Google Search that can synthesize an answer and link to supporting web pages. Google says these features are…
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