What is llms.txt, and does your business actually need one?

If you have been reading about AI search, you have probably seen llms.txt mentioned as the thing you must add to get recommended by ChatGPT. The reality is quieter and more useful. llms.txt is a small, sensible file that can help, but it is nowhere near the top of the list of things that decide whether AI names your business. Here is the honest version.

What llms.txt actually is

llms.txt is a plain text file you place at the root of your website, at yourdomain.com.au/llms.txt. It is a proposed standard, a bit like robots.txt, but aimed at large language models rather than search crawlers. The idea is to give an AI a clean, curated map of your site: who you are, what you do, and links to the pages that matter most, written in a format a model can read without wading through menus, pop-ups and scripts.

Think of it as a one-page briefing note for a machine that is trying to understand your business quickly.

What it does not do

This is where the hype gets ahead of reality. llms.txt does not:

• Guarantee you get mentioned. No file makes a model recommend you. Recommendation is earned through evidence, not declared in a text file.
• Get read by every assistant. Adoption is still patchy. Some tools consider it, many ignore it, and support changes month to month.
• Fix a thin or unclear website. If your pages do not clearly say what you do and where, a summary file will not rescue them.

So it is a helpful signal, not a switch. Treating it as the main event is the mistake.

Does it help you get recommended?

A little, and mostly on the margins. A clean llms.txt makes it easier for a model that does read it to understand you correctly, which never hurts. But it sits well below the things that actually move the needle. For the full picture of how the shortlist gets built, see How AI assistants choose which businesses to recommend.

The levers that matter far more:

1. Clear, specific pages that answer the questions your customers really ask.
2. Genuine reviews that describe your work in plain language. We cover why in Do online reviews affect what AI recommends?.
3. Consistent business details across your site, your Google profile and directories.
4. Credible mentions on pages AI already trusts and cites.

Get those right and you will be recommended with or without an llms.txt. Get them wrong and llms.txt changes nothing.

How to add one, if you want to

If you would like to add it anyway, and there is no harm in doing so, keep it simple:

• Create a file named llms.txt and put it at the root of your domain.
• Start with a short heading and one or two sentences on what your business does and the areas you serve.
• List your most important pages as Markdown links with a few words describing each: services, pricing, about, contact.
• Keep it current. An out-of-date briefing note is worse than none.

That is the whole job. It should take an afternoon at most, and far less if your site is already clear.

Should a small business bother?

Here is the plain verdict. If your website is already clear and your reviews and listings are in good shape, adding llms.txt is a tidy finishing touch worth an hour. If they are not, spend that hour on the fundamentals instead, because that is what decides whether AI names you.

The honest way to know where you stand is to look. Run a free AI check to see how often ChatGPT, Claude, Gemini and Perplexity mention your business today, and who they recommend instead. That tells you whether your problem is a missing text file or something much more worth fixing first. If AI is not naming you at all yet, here are the usual reasons.