What Is AI Visibility?

The working definition

Traditional visibility meant your rank in a list of blue links. AI visibility means being inside the answer itself: when someone asks ChatGPT, Perplexity or Google's AI Mode something your site could answer, does the engine know you exist, understand what you say, and quote you?

It decomposes into three testable layers:

• Access — can they crawl you? Every AI engine runs crawlers (GPTBot, OAI-SearchBot, ClaudeBot, PerplexityBot, Google-Extended). Your robots.txt decides whether your site is in their corpus at all. This layer is binary: blocked means invisible.
• Understanding — can they parse you? Structured data (Organization, Product, FAQPage schema), clean heading structure and llms.txt tell machines what you are, what you sell and which pages matter.
• Citability — will they quote you? Engines assemble answers by lifting passages. Question-shaped headings, self-contained paragraphs and direct first sentences make your text liftable; marketing fluff is not.

How an AI answer actually gets written

When a user asks a question, the engine retrieves candidate pages from its index (or fetches live), parses them into passages, selects a handful that answer the question, and writes a response citing them. Your site competes at every step:

1. Retrieval: only pages the crawler was allowed to fetch are candidates.
2. Parsing: pages whose structure and schema are machine-readable produce cleaner passages.
3. Selection: the engine picks passages that directly answer the prompt — specific, factual, self-contained.
4. Attribution: some engines cite sources visibly; being quotable is being visible even when only the text is used.

How do you measure it?

Two complementary methods. Brand monitoring: ask engines questions your customers ask and log whether you're mentioned (that's what paid GEO platforms do). Technical readiness: score whether your site passes the access, understanding and citability layers — that's what the free checker on our homepage does in about fifteen seconds, no signup.

Readiness is the half you control directly this week: most sites lose easy points to blocked AI crawlers, missing schema and walls of unstructured copy. Fix those and your odds in every future answer improve; then monitor brand mentions as engines pick you up.

Where to go next

• Run the free AI search readiness check on your domain.
• See what the number means: AI visibility score, explained.
• Open the gates: how to allow AI crawlers in robots.txt.
• Add the machine-readable map: build one with the llms.txt generator (see a full llms.txt example).