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llms.txt Explained: Helping AI Crawlers Read Your Site
Quick answer: llms.txt is a proposed plain-text file placed at your site's root that gives AI systems a curated, Markdown map of your most important pages. It does not control access like robots.txt; it suggests priority content. Today most major AI crawlers ignore it and Google says it has no ranking effect, so treat it as a low-cost, experimental add-on rather than a fix.
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What is llms.txt, and what does the file actually do?
llms.txt is a proposed convention introduced in 2024: a single plain-text file you place at the root of your domain, at yoursite.com/llms.txt. Inside, you write a short, Markdown-formatted table of contents that points large language models toward your most useful pages — documentation, key guides, product explainers, pricing. The idea is to hand AI systems a clean, curated shortlist instead of leaving them to infer importance from a sprawling site.
The reasoning behind it is sound. Language models don't crawl and weigh pages the way a traditional search engine does, so genuinely helpful content can get buried or skipped. A concise map, written in plain Markdown that's cheap to parse, theoretically helps an assistant find and quote the right material faster.
There's also an optional companion, llms-full.txt, which inlines the actual content rather than just linking to it. Think of llms.txt as the index and llms-full.txt as the full text for systems that want everything in one place.
Put your organic marketing on autopilot
artiql researches, writes and publishes SEO + GEO content in every language — and turns each article into a video. See it run on your brand.