llms.txt: What It Does, and Where It Fits

An llms.txt file is a Markdown summary of a website with links to useful pages. It is an emerging convention that some tools may read. Creating one does not mean every AI system will use it, index your site, or recommend your business.

Do local businesses need one?

It is optional. Google says its AI search features do not require new machine-readable files or special markup. For a small service business, accurate information, useful service pages, reliable contact options, and crawlable content deserve attention first.

When it can be useful

If a tool you use explicitly supports the convention, a short, maintained overview may help that tool find your documentation or key pages. Include a description, canonical links, and accurate contact information. Do not put private information in a publicly served file.

Keep expectations realistic

It is not a substitute for robots.txt, a sitemap, or the content on your site. If you publish it, keep it consistent with the website and treat it as optional maintenance rather than a ranking project.

This guide replaces our earlier recommendation that every business needs this file. That advice overstated its demonstrated role in search.

Read our practical Google and AI search checklist. Source: Google’s AI search guidance.