← Glossary
llms.txt
A proposed plain-text file at a site's root that offers language models a curated map of its most useful pages.
The idea borrows from robots.txt and sitemap.xml: a single file at the root, written in markdown, pointing models at the documents you most want used when answering questions about you.
Adoption is uneven and support is not guaranteed by any major engine, so treat it as cheap insurance rather than a strategy. The cost of publishing one is an afternoon. The cost of assuming it will move your visibility is a quarter.
Where it does earn its place is as a forcing function. Writing the file requires deciding which twenty pages actually represent you, and that decision is usually more valuable than the file.
Related
Generative engine optimization (GEO)The practice of getting a brand named and cited inside answers written by AI assistants, rather than ranked in a list of links.Answer engine optimization (AEO)A near synonym for GEO, usually emphasising direct-answer surfaces such as AI Overviews and featured snippets rather than conversational assistants.