llms.txt is a text file published in a website's root directory (yourdomain.com/llms.txt) that summarises, in Markdown, what the site is about and which of its pages matter for AI systems. Proposed by Jeremy Howard in September 2024, this approach isn't an official standard yet: Google states clearly that it doesn't support llms.txt, and there's no strong evidence that major AI crawlers read the file regularly. Even so, from May 2026 Shopify began generating an llms.txt file automatically for every store. So today llms.txt isn't a guaranteed ranking factor but a low-cost preparation step.
In this article we explain what llms.txt is and isn't, how it works on Shopify and the AI visibility steps that really matter.
What is llms.txt, and what isn't it?
llms.txt is a guide file, easily readable by people and AI models, containing a short description of your site and links to your important pages. An example structure: the site name at the top, a short description below it, then links to important pages under headings such as "Products", "Guides" and "Policies".
Commonly confused points:
llms.txt | robots.txt | sitemap.xml |
|---|---|---|
Gives AI a summary of the site and its important pages | Tells crawlers which pages they can access | Lists all of a site's URLs for search engines |
Advisory, not binding | Most crawlers follow it | Actively used by search engines |
Not an official standard | A de facto standard | An official protocol |
llms.txt doesn't restrict which content AI models can use. robots.txt is used to manage AI crawlers' access.
Does llms.txt work?
Here's today's picture:
Google doesn't support it. Google representatives have said they don't use llms.txt and compared it to the old meta keywords tag.
Major AI crawlers rarely request the file. Independent research shows crawlers such as GPTBot and ClaudeBot read llms.txt at very low rates.
No measurable effect on AI citations has been seen. Analyses of hundreds of thousands of domains found that having llms.txt didn't predict being cited more often in AI answers.
It's valuable in some use cases. Coding assistants, AI agents and documentation tools can use llms.txt. Chrome's Lighthouse also checks for the file in its agent-readiness audit.
In short, llms.txt doesn't deliver AI visibility on its own; but because it's easy to prepare and may help AI agents understand a site, it can be treated as a low-cost precaution.
How does llms.txt work on Shopify?
From May 2026, Shopify automatically publishes an llms.txt file on every store. This file is based on a generic template containing basic information such as store details, collections and policies. In the same period, Shopify also introduced other discovery files and endpoints aimed at AI agents.
The automatic file is a good start, but it may not contain the information that best describes your brand. Customised content that highlights your key categories, best-selling products and pages answering customer questions such as size guides, shipping and returns makes the file more useful.
How do you write a good llms.txt?
Start with a short, clear description. Explain in a sentence or two what your brand sells, who it's for and which markets it serves.
Group your important pages. List links under headings such as main categories, guide content, FAQs and shipping and returns policy.
Add a short description to each link. State in one sentence what the page contains.
Keep it up to date. Removed products and changed policies shouldn't stay in the file in their old form.
Don't add private or unimportant pages. Pages such as the cart, account and filtered URLs shouldn't appear in the file.
What really matters for AI visibility
Steps far more decisive than llms.txt:
Allowing AI crawlers in robots.txt. An AI system that can't crawl your site can't cite you as a source.
Using structured data (schema). Product, organisation, FAQ and article markup helps machines understand your content correctly.
Producing content that answers questions directly. Content that gives a clear answer in the first paragraph and then goes into detail is used more often in AI answers.
Being mentioned on trustworthy sources. Your brand appearing on news sites, industry blogs and review platforms helps AI systems recognise you.
We cover these topics in detail in our guide to GEO.
Frequently asked questions
Does llms.txt affect SEO?
As Google doesn't use llms.txt, it has no direct effect on Google rankings. Its effect on AI systems isn't proven at this point either.
Do I need to create llms.txt for my Shopify store?
Shopify creates the file automatically. Customising its content to highlight your brand's important pages is a useful improvement.
Does llms.txt stop AI from using my content?
No. llms.txt isn't an access restriction. robots.txt is used to manage AI crawlers' access.
Let's plan your AI visibility together
llms.txt is only a small part of AI visibility; the real difference comes from technical foundations, structured data and content strategy. If you'd like to review your site's GEO together, get in touch through our SEO and GEO consulting page.
