llms.txt Explained: What It Is and Whether You Need It

llms.txt is a plain text file, written in Markdown, that you place at the root of your website (yoursite.com/llms.txt) to give AI tools a short, clean summary of who you are and which pages matter. Jeremy Howard proposed it in September 2024, and it is still a proposal, not an official standard. This guide explains what goes in it and, just as important, what it does not do.

For decades websites have carried a file called robots.txt that tells search engines which pages they may crawl. llms.txt borrows the idea for the AI era, with one difference: instead of listing what to avoid, it describes what the site is. It sits alongside the wider work described in answer engine optimization for small business.

What goes in an llms.txt file?

The proposal at llmstxt.org asks for a heading with the site's name, and optionally a short summary, some plain notes and sections of links with a line about each. For a local business, that translates into a handful of facts:

• The business name, exactly as it appears on your Google profile.
• A one- or two-sentence summary: what you do, who it is for and which cities you serve.
• Your main services, each with a link to its page and a line describing it.
• The cities you serve, named in plain text.
• Contact details and hours that match everything else on the web.
• Links to the pages that answer common questions, such as an FAQ, pricing and about pages.

Say an air conditioning company in McAllen wrote one. It would start with the company name, then a summary such as "Residential air conditioning repair and installation in McAllen, Mission and Edinburg, Texas", then a short list of links to repairs, new installations, maintenance plans and contact.

Does llms.txt actually help?

Here is what is known. Google's guide to optimizing for its AI features says you do not need new machine-readable files or AI text files to appear in Google Search, and that files like llms.txt neither help nor harm your visibility there, because Google Search ignores them. Google's John Mueller has said that nobody really knows whether the file does anything and that AI systems do not seem to use it, as Search Engine Journal reported in 2026. As far as published information shows, no major AI company has confirmed that its systems read llms.txt.

That does not make the file useless, and it does not make it a shortcut either. It is cheap, it takes minutes, and writing it forces you to state plainly who you are and where you serve, which is worth doing anyway.

Why is the location line worth writing?

For a local business, "serving McAllen, Mission and Edinburg, Texas" is the sentence that tells anyone, human or machine, which customers you are for. Without it, a reader has to guess your service area from a cluttered homepage. Whether or not an assistant ever reads llms.txt, the same sentence belongs on your homepage and your Google Business Profile, where Google and other tools already read it.

A business with no reputation anywhere does not become recommendable by writing a file. An assistant that describes you will still lean on what the rest of the web says about you, so this file is a small supporting piece, not the foundation.

What matters more than llms.txt?

• Your robots.txt. Make sure you are not blocking AI crawlers by accident. Mueller's advice, as reported, was that the most basic step is not to block them, and should you block or allow AI crawlers? explains how to check.
• A website that says clearly what you do and where, in real text a visitor can read. Labelling those facts with schema markup is an optional extra.
• Consistent details on your Google Business Profile and the directories that list you. Bing Places and Apple Business Connect covers the ones beyond Google.
• Reviews and mentions on other real sites, which give an assistant something to check your claims against.
• A regular look at what assistants actually say about you, as described in how to check what ChatGPT says about your business.

For the bigger picture of how AI search affects businesses in the Valley, see AI search in South Texas.

How do you get one?

The Growrank dashboard generates an llms.txt file for you from your own website. Download it, send it to whoever manages your site and ask them to place it in the root folder, so it loads at yoursite.com/llms.txt. Then open that address in a browser to confirm it is live, and update it when your services, cities or contact details change. The pricing page has the details on the dashboard.

Frequently asked questions