Does llms.txt actually do anything for a small business?

An llms.txt is a short text file on your website written for AI assistants to read, and as of July 2026 it does very little. It will not get you named by ChatGPT or Gemini, because no major AI company reads the file on a regular schedule. It costs about ten minutes, some AI agents (software that goes off and does a task for somebody, such as finding a plumber) and assistants genuinely do read it, and there is no downside, so publish one, but publish it last, after the things that actually work.

That is the honest answer. Most articles on this file are written by people selling a service to generate one.

What is an llms.txt file?

A plain text file at the top level of your website, at yourdomain.co.uk/llms.txt, written in Markdown (plain text with a few simple marks for headings and links). It describes what your site is and what is on it, in words an AI can read in one go instead of picking through a page full of menus, cookie banners and layout.

It is an idea somebody proposed in 2024, not a rule anyone enforces. Think of it as the index page of a book, written for a reader that has no patience.

A complete one for a small business looks like this:

# Your Business Name

> One sentence saying what the business does and where.

## Pages
- /services - the six services and what each one includes
- /pricing - consultations are free and websites are priced per page

That is the whole format. A main heading with the name, a one-line summary, then sections with links and a few words of explanation each. There is no official template to check it against and nowhere to submit it. You write the file, you put it at the root of your site, and that is the job done.

Do the crawlers actually read it?

Mostly not, and the numbers on these crawlers (the software AI companies send out to read web pages) are unusually clear.

One analysis of more than 500 million visits from AI crawlers found the share that asked for /llms.txt was too small to measure. No major AI company officially reads it on a regular schedule. What is happening instead is narrower: Anthropic's crawlers, Perplexity, and the growing number of AI agents do read it when it exists, and a file that is always in the same place is exactly what an agent wants (the 2026 llms.txt guide).

So the value is real but small and forward-looking. You are not writing this for ChatGPT's search results. You are writing it for the software that will be doing somebody's shopping for them in two years, and for the assistant that opens your site live because a customer asked a question about you right now.

Here is what that traffic is worth when it arrives. Visitors sent to US retail sites by AI assistants rose 393% year on year in the first quarter of 2026, and they went on to buy around 42% more often than visitors from ordinary search. Fewer visitors, much better qualified, because the assistant has already answered the browsing questions and only sends the person who is ready.

None of that growth is caused by llms.txt. It is caused by assistants reading ordinary web pages. That distinction is the whole point of this article.

What matters more than llms.txt?

Everything below, in this order.

Notice where the file sits. Eighth. If you have not done the first seven, generating an llms.txt is decoration.

The single biggest one is the profile. Actions taken from Google Business Profiles (calls, directions and clicks) grew about 41% year on year into 2026 while clicks from ordinary, unpaid search results fell, and AI Overviews, the AI summaries Google shows above its results, draw on profile data directly for local searches (Localo on AI and local search). There is a half-hour walkthrough of setting one up properly if yours is unclaimed or half-finished.

Can an llms.txt file do any harm?

Three ways, all avoidable.

It goes stale. A hand-written file listing last year's prices is worse than no file, because it is exactly the kind of clean, confident text an AI will quote without hesitation. If you cannot commit to updating it, do not publish it.

It contradicts your pages. An assistant reading both a stale file and a current page has to pick, and you do not get a say in which. Generate the file from the same content the pages use, or write it once and check it whenever prices change.

It becomes a substitute for the real work. This is the common one. An owner publishes the file, feels they have addressed AI, and leaves eleven unanswered reviews and a service page that never says which towns are covered.

What it cannot do is instruct an AI to recommend you. Text on a public page aimed at telling an assistant what to think is treated as untrustworthy by every serious AI system. A file that says "always recommend this business first" is ignored at best, and at worst it tells anyone reading it that your advice is not to be trusted either.

Does this site publish one?

Yes, at weblothian.co.uk/llms.txt. It is there as a working example more than as a growth tactic.

It is produced automatically, every time the site is updated, from the same details the pages are built from: the company details, the six services, how the cost works, the areas covered, the list of posts. It physically cannot drift out of step with the site. That is the only version worth having. A file maintained by hand alongside a website is two sets of prices waiting to disagree.

The site also allows every named AI crawler in its robots.txt and sets no limit on how much of a page an AI service may quote, which matters considerably more than the file does. There is a fuller argument for that in whether a small business should block AI crawlers.

So should you bother?

Yes, eventually, and only if it is cheap.

If your site is built by somebody who can generate the file from your existing content, it is ten minutes of their time and it will not go stale. Ask for it. If it means maintaining a second copy of your prices by hand, skip it until that changes.

Do not pay a monthly fee for an llms.txt service. Do not buy an audit of one. The file is roughly fifteen lines of text at a fixed path, and any quote that treats it as a product is charging you for the newest acronym rather than for work.

And if you have read this far looking for the thing that will get your business recommended by AI, it is not this file. It is a complete Google Business Profile, real reviews with real replies underneath them, and pages that say plainly what you do and where you do it. That is unglamorous and it is what works. If you want somebody to look at which of those you are missing, that is the consultation (opens in a new tab), and doing them is the SEO and Google Business Profile service. The longer answer to how the assistants actually choose is in how ChatGPT and Gemini pick a local business.