What is AI crawler?

An AI crawler is an automated agent that fetches web content to feed an AI system — training data pipelines, retrieval-augmented answer engines, and shopping/task agents — rather than to build a classic search index. The distinction matters because AI crawlers vary widely in behavior: some render JavaScript, many do not; some respect robots.txt and dedicated user-agents for opt-out, others are more aggressive; and a growing set look for agent-oriented files (llms.txt, llms-full.txt) as a fast path to clean content. For a brand, the practical implications are: serve important content in server-rendered HTML rather than client-only rendering so non-rendering crawlers can read it; keep schema markup complete so facts are machine-parseable; use robots.txt and per-crawler user-agent rules deliberately to allow the crawlers you want and manage the ones you don't; and maintain an agent-readable layer that advertises your most citable pages. Blocking the wrong crawler can quietly remove a brand from the AI answers where its customers now research.