llms.txt explained: does your store need one?

llms.txt is getting a lot of attention, and much of it is hype. Below: what the file is, what the evidence says about whether it helps, and whether your store needs one right now.

What llms.txt is

llms.txt is a plain markdown file you put at the root of your site, at /llms.txt. It lists your most important pages and content in a clean, structured form that a language model can read without wading through your HTML, navigation and scripts. The idea was proposed by Jeremy Howard of Answer.AI in 2024, and there is a fuller variant, llms-full.txt, that inlines more of the content.

Think of it as a carefully chosen site map written for machines. It is cheap to produce and does no harm.

Does it help?

This is where the hype and the evidence part ways.

• AI search crawlers mostly ignore it today. The crawlers that build the indexes assistants cite from, like OAI-SearchBot and PerplexityBot, mostly skip /llms.txt and read your HTML directly. Adoption is still low, nowhere near robots.txt or sitemaps.
• There is no measured citation lift. We know of no public study showing that adding llms.txt makes AI assistants cite a store more often.
• But some agents do use it. Some coding assistants fetch llms.txt when they look up a project's documentation.

So llms.txt is a cheap way to point AI agents at your key pages. Nobody has shown that it improves visibility in AI search, so treat it as an optional extra.

Does your store need one?

Add it, but for the right reason and with the right expectations:

• Add it, because it is cheap, harmless and prepares your store for a web where more is done by AI tools.
• Do not expect your products to suddenly appear in ChatGPT because of it.
• Do not let anyone sell you llms.txt as an important part of AEO. It is a small, optional extra.

What moves your AI visibility

If your goal is to be recommended by assistants today, start with your structured data, your identifiers and your product feed, all clean and in sync. That is the product information assistants read. (What AEO is covers the whole picture, and which schema fields matter covers the data.)

We host an llms.txt as a small extra. The real work is the data and the feed. Start by seeing where your store stands: check your store for free.