What Is llms.txt?

WHITO GLOSSARY · MEASURED DEFINITIONS

A plain-text file telling AI systems what a site offers and where its key pages are. Adoption is tiny: 1 site in 120 UK independent business websites audited had a hand-written llms.txt.

The number: AI Readiness of UK Business Websites.

What it means in practice

llms.txt is cheap, quick and almost nobody has one. That is the entire argument: a small readable file against a field that has not moved.

Write it by hand: what the business does, where the key pages are, what your research or proof pages contain. Ten minutes, done once, read by machines forever.

Whito stage: Build. Buy this once the foundations are set, not before.

The numbers to hold onto

Where to go next

Related: Structured data, AI recommendation audit, AI-invisible business

All terms · The files behind the numbers