What is llms.txt and does it help with SEO?

llms.txt is a file that gives AI systems (ChatGPT, Perplexity, Google AI Overviews) a clean, structured description of your website. It is NOT a Google ranking factor. Google's John Mueller has publicly said Google doesn't use it. It helps with AI answer engine visibility, not traditional search rankings.

What are markdown mirrors and do they affect Google rankings?

Markdown mirrors are clean text/markdown versions of your key website pages, designed for AI crawlers to parse easily. They do not affect traditional Google rankings. They help AI answer engines like ChatGPT and Perplexity cite your content more accurately.

Does Shopify automatically create an llms.txt file?

Yes, Shopify auto-serves a generic llms.txt and agents.md file with commerce boilerplate (referencing Shop Pay, products, etc.). For services sites or businesses that don't match the template, this generic content can misrepresent your site to AI systems. You can override it with a custom theme template.

How do I check if my website has an llms.txt file?

Visit yourdomain.com/llms.txt in your browser. If you see content, check whether it accurately describes your business. If it's generic boilerplate or a 404, AI answer engines can't properly understand your site.

Back to blog July 06, 2026

I Made My Website Legible to AI Search by Asking an AI

AEOAIAI CoworkerFirst-Handllms.txtSEOViktor

I saw an Instagram Reel from a marketing guy claiming you need three things to "rank better" in 2026:

An XML sitemap
An llms.txt file
Markdown mirrors of your pages

Two of those three are real. One of the claims is not.

I sent the Reel to my AI coworker (Viktor) and asked if he agreed. His answer surprised me, and then he set the whole thing up in about 10 minutes. Twice.

Here's how that actually went.

The Reel That Started It

I was scrolling Instagram and saw this Reel from @brycenwood.ai. Google search screenshot, local map pack, captions saying "I don't pay a dime" and "that's my business right there." Classic hook.

The pitch: set up llms.txt, markdown mirrors, and an XML sitemap, and your site will rank better.

I already had a sitemap submitted to Google Search Console. But I'd never heard of llms.txt or markdown mirrors. So I sent it to Viktor.

Slack message where I send Viktor an Instagram Reel about llms.txt and ask if it works

The Honest Answer I Didn't Expect

Viktor didn't just agree or disagree. He broke it into two separate things:

XML sitemap = real Google ranking factor. Already done. Table stakes.
llms.txt and markdown mirrors = NOT Google ranking factors. Google's own search team (John Mueller) has publicly said Google doesn't use llms.txt. No evidence markdown mirrors change traditional rankings either.

So where DO they matter?

Getting cited in AI answers. ChatGPT, Perplexity, Google AI Overviews. Those systems pull from whatever clean, structured content they can find. An llms.txt file and markdown mirrors give them exactly that.

Viktor's exact words: "worth doing IF the goal is showing up in AI answers. It won't move your Google rankings."

Viktor explaining that llms.txt helps with AI answers, not Google rankings

That distinction matters. Most of the "llms.txt SEO" content floating around right now is packaging an AI-visibility play as a Google rankings play. They're different things. Both worth doing, but for different reasons.

The Shopify Problem Nobody Mentions

I told Viktor to go ahead and set it up.

Roger telling Viktor to go ahead and execute on llms.txt

About 10 minutes later he came back with everything live, plus a discovery I hadn't expected.

Shopify was ALREADY auto-serving an llms.txt and an agents.md file on my site. The problem? It was generic commerce boilerplate. "Buy products via Shop Pay" type stuff.

My site has zero products. It's a consultancy. So any AI crawling chiefmarketingdad.com/llms.txt was reading a description of a site that doesn't exist.

Viktor overrode both with real content:

A curated index of who I am, my 4 services, 40+ brands, all blog posts, and contact info
Each entry linking the real page plus a clean markdown copy
8 markdown mirrors (Home, Fractional CMO, Business Investment, Business Coaching, AI Implementation, Meet Roger, Brands, Book a Meeting)

Viktor reporting that llms.txt and markdown mirrors are live, with the Shopify boilerplate discovery

What It Actually Looks Like

Here's what AI systems see now when they hit chiefmarketingdad.com/llms.txt. Instead of "buy products via Shop Pay," they get a real, structured map of the site:

The live llms.txt file on chiefmarketingdad.com showing curated site content for AI crawlers

Every service page, every blog post, the brands page, contact, all of it. Clean markdown, easy for any LLM to parse. The same content also serves at /agents.md (some AI systems look for that instead).

Then I Had Him Do It Again

If it works for one site, why not two?

I asked Viktor to set up the same thing for ThreadPoint, the email marketing agency I co-founded. Same story there: Shopify was auto-serving the same useless boilerplate.

Roger asking Viktor to set up llms.txt for ThreadPoint, and Viktor completing it

ThreadPoint has 50+ blog posts, 11 service pages, and 6 industry pages. Viktor mapped all of it into a curated llms.txt with 20 markdown mirrors. Same 10 minutes.

Both sites now give AI answer engines exactly what they need instead of a generic template that describes a store that doesn't exist.

What I'd Tell Another Business Owner

If you're on Shopify (or really any platform), check your /llms.txt right now. Go to yourdomain.com/llms.txt and see what shows up.

If it's generic boilerplate, or a 404, you're leaving AI visibility on the table. Every time ChatGPT, Perplexity, or Google AI Overviews tries to understand your site, they're either getting nothing or getting the wrong description.

A few things worth knowing:

llms.txt is NOT an SEO hack. It won't change your Google rankings. But it does help AI systems cite you accurately when someone asks a question your site can answer.
Markdown mirrors are the same idea. A clean text version of your key pages that's easy for LLMs to parse. Not a ranking factor, just good AI hygiene.
Your XML sitemap is the only one of the three that actually affects Google. If you haven't submitted one to Search Console, do that first.
If you're on Shopify, check what's already being auto-served. It might be describing a site that doesn't look anything like yours.

The whole thing took about 20 minutes across two sites. I typed "go ahead and execute" and Viktor handled the rest. If you want to try the same thing, you can try Viktor here (you'll get $150 in credits and $50 off).

More on how I use AI: My genuine Viktor review after months of daily use | I rebuilt this website by talking to an AI in Slack

Written by

Roger Parent

Founder of Chief Marketing Dad · Fractional CMO

Roger has spent 15+ years helping ecommerce brands grow, these days as a fractional CMO working with a handful of brands at a time. He digs into the numbers most people skip and cares way more about what actually moves revenue than what looks good in a deck. When he is not buried in an ad account, he is usually with his wife and kids or on a pickleball court somewhere in Connecticut.

More about Roger →