llms.txt is a proposed file that tells AI models which content on your site matters most, a roadmap built for LLMs.
It sits at yoursite.com/llms.txt, in plain markdown. It is new and not yet universally used, but it is low effort with possible upside.
What it does
- Points to key pages. Highlights your most important content.
- Gives clean context. Structured information in one place.
- Complements robots.txt, which controls crawling, not priority.
Should you add one
- Optional and emerging. Not a must-have yet.
- Low effort. A simple markdown list of key URLs.
- Guides only. It does not secure or guarantee anything.
Note: Adoption is still early. Treat llms.txt as a cheap experiment, not a core ranking lever.
Frequently asked questions
Do I need an llms.txt file?
It is optional and still emerging. It is low effort, so it can be worth a try, but it is not a core ranking lever like content or authority.
Where does llms.txt go?
At yoursite.com/llms.txt, in plain markdown, listing your most important pages and context for AI models.
Does llms.txt secure my content?
No. Like robots.txt it only guides crawlers; it does not enforce or protect anything.
Further reading: Google explains the limits of llms.txt.