What Is llms.txt, and Does Your Site Need One?

llms.txt is a plain-text file you place at the root of your website that points AI systems toward the pages you consider authoritative. It is a proposal, not a standard, and no major system currently guarantees it will be read.

That is the honest answer. Now the useful part: why the idea exists at all, and what you should do about it.

The problem it tries to solve

A modern website is mostly furniture. Navigation, cookie notices, related-post carousels, script tags. A human eye skips past all of it. A machine reading raw HTML has to wade through it.

llms.txt is the equivalent of handing a visitor a one-page building directory instead of letting them wander every floor. It lists your key pages in Markdown, with a short description of each, in the order you consider meaningful.

What the file looks like

The format is deliberately simple: an H1 with your site name, an optional blockquote summary, then linked lists grouped under H2 headings.

# TerraWell LLC

> B2B digital visibility and remote business support.

## Core pages
- [Services](https://example.com/services): The six service areas.
- [About](https://example.com/about): Company background and structure.

## Optional
- [Blog](https://example.com/blog): Articles on SEO and AI visibility.

You can write it by hand in fifteen minutes. That is the point.

What it does not do

Be clear-eyed here, because the topic attracts overclaiming.

• It is not indexing control. robots.txt and meta directives govern crawling and indexing. llms.txt does neither.
• It does not guarantee citation. No file makes a model recommend you.
• It is not widely adopted. Some AI tooling reads it. Most large assistants have not committed to it publicly.

Anyone selling llms.txt as a ranking service is selling weather insurance for a forecast nobody has made yet.

So is it worth adding?

For most sites, yes — but as a fifteen-minute task, not a project.

The cost is close to zero. The file is static, tiny, and harmless. If adoption grows, you are already positioned. If it does not, you have lost an afternoon coffee's worth of time.

The exception is a site whose information is disorganized. Writing the file forces you to answer a question you may have been avoiding: which ten pages actually explain this business? If that list is hard to produce, the file is not your problem. The site structure is.

A more durable version of the same idea

Whatever happens to this particular proposal, the underlying instinct is sound: publish a clear, machine-friendly account of who you are.

You can do that today with tools that already work everywhere:

• A services page that names each offering in plain language.
• An about page with verifiable company details.
• Structured data describing your organization and services.
• A sitemap that lists live, meaningful URLs only.
• Consistent entity details across every page and profile.

Those five things will still matter in five years. llms.txt might. Do the five first, then add the file because it takes fifteen minutes and costs nothing.