llms.txt is the file AI assistants like ChatGPT, Claude, and Perplexity read to understand what your business does. Enter your website and get one in seconds. No signup.
Why it matters
When someone asks an AI assistant for the best business like yours, the assistant reads the web to answer. An llms.txt gives it a clean, accurate summary of who you are and what you offer, so it describes and recommends you correctly instead of guessing.
A plain text file at the root of your website that tells AI assistants what your business is, what it offers and which pages matter. It does the same job for assistants that robots.txt does for crawlers: it removes the guesswork. Without one, an assistant describing you is assembling an answer from whatever it happened to read, which is how businesses end up described as something they stopped doing years ago.
Upload the generated file to the root of your domain so it sits at yoursite.com/llms.txt, the same place as robots.txt. Most site builders have a way to add a file at the root; if yours does not, your developer will do it in a minute. Nothing else needs to change.
It is not a ranking trick and it will not move you up a results page. What it does is make the description assistants give of you accurate and consistent, which matters because that description is increasingly the only thing a buyer sees before deciding who to contact.
Yes, whenever what you sell changes. A file describing services you no longer offer is worse than no file, because it is confidently wrong rather than absent. Bump keeps yours current automatically, but the generated file here is yours to use whether or not you ever sign up.