AI Search and GEO

What Is llms.txt? Its Real Effect on AI Visibility

llms.txt is a proposed Markdown file that gives AI agents a curated map of your website. This guide defines the format, shows a working example, compares llms.txt with robots.txt and sitemaps, explains llms-full.txt and generators, reviews what Google has actually said, and sets out the work that genuinely earns citations in ChatGPT, Gemini and Perplexity.