The short answer
llms.txt is a plain text file at the root of a website that gives AI tools a short summary of the site and links to its most useful pages.
It is a proposal rather than an agreed web standard, so you should not assume any assistant reads it. It takes under an hour to write, so it is worth adding, but it will not get you named on its own.
What goes in it
- A heading with the business name.
- One or two sentences on what the business does, for whom and where.
- Short lists of links to the pages that matter, each with a one-line description.
- Facts people often get wrong: prices, areas served, what you do not do.
Keep it short and true. It should match what your pages say, word for word where it can.
A small example
# Example Plumbing Ltd (fictional business) > Boiler servicing and repairs for homes in one town. > Gas Safe registered. No commercial work. ## Pages - [Boiler servicing](https://example.co.uk/servicing): what a service includes, price, how to book - [Areas we cover](https://example.co.uk/areas): the postcodes we serve
Illustration · fictional business.
Where it sits in your priorities
Below the basics. Clear answers on your pages, consistent facts, crawlable pages and accurate mentions on other sites all come first. Add llms.txt once those are in hand, and update it when your main pages change.
Next steps
For structured data inside your pages, read whether schema markup helps with AI answers. For the bigger picture, see how to get your website cited. GEO Agency's page analysis checks crawlability and structure alongside five other areas; it runs on Google Gemini and gives estimates. See plans and prices.
Common questions
Does ChatGPT read llms.txt?
We cannot confirm that any particular assistant reads it, and you should not assume one does. Treat it as an optional extra, not a way to be recommended.
Is llms.txt the same as robots.txt?
No. robots.txt tells crawlers what they may fetch. llms.txt is a suggested summary of your site with links to the pages that matter. It does not allow or block anything.
Where does the file go?
At the root of your domain, so it can be found at yourdomain.co.uk/llms.txt, as a plain text file written in Markdown.
Does GEO Agency have one?
Yes. Ours lists the main pages, the plans and prices, the guides and our limits. You can open geo-agency.co.uk/llms.txt to see the format.