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, identified by the user-agent string GPTBot, that visits publicly accessible websites to collect content for training a…
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 proposed web standard, stored at yourdomain.com/llms.txt, that provides AI language models with a structured, Markdown-formatted index o…
What is GEO (Generative Engine Optimization)?
Generative Engine Optimization (GEO) is the practice of structuring and presenting web content so that AI language models — including ChatGPT, Claude,…
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 the likelihood that a website or page will be cited, referenced, or surfaced as a source in AI-generated answers and AI search…
What is Passage-Level Indexing?
Passage-level indexing is the practice by search engines and AI retrieval systems of independently evaluating and extracting discrete sub-sections (pa…
What is AI Crawlability?
AI crawlability is the degree to which AI systems — ChatGPT, Claude, Perplexity, Google Gemini — can technically access, fetch, and parse a website's …
What is Citation Readiness?
Citation readiness is the degree to which a piece of content is structured for an AI system to confidently quote it as an authoritative source. Where …
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 Google's AI-generated answer block that appears above traditional results for many queries, synthesizing an answer from multiple web…
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