You only need an llms.txt file if you care about being understood and quoted by AI search tools (ChatGPT, Gemini, Perplexity, etc). If you just want more calls from Google Maps next week, it’s not your first job.
llms.txt is a simple text file you put on your website that points AI systems at your best pages, so they don’t waste time chewing on your cookie banner, thin pages, or random blog posts. It won’t magically rank you. It won’t fix a crap website. But it can make your site easier for AI to read, and that’s where search is heading.
What is llms.txt, in plain English?
It’s a file that sits at:
https://yourdomain.co.uk/llms.txt
Inside, you give AI tools a clean “start here” list.
Think of it like handing a rushed journalist your best sources, instead of letting them wander around your site guessing.
It’s not a formal web standard (yet). It’s a convention that’s gaining traction because AI crawlers are messy, and most websites are even messier.
What does llms.txt actually do?
It does two things:
- Guides AI crawlers to the pages you actually want them to read.
- Provides context so they can summarise your business without making things up.
It’s basically AEO (Answer Engine Optimisation) hygiene.
If your site is a brochure, llms.txt is the Post-it note that says “read page 3, not the back cover.”
Is llms.txt the same as robots.txt or a sitemap?
No. Different jobs.
| File | What it’s for | Who uses it most | What it changes |
|---|---|---|---|
robots.txt |
Crawl permissions (allow/disallow) | Search engine bots | What bots are allowed to fetch |
sitemap.xml |
A list of URLs you want indexed | Search engines | Discovery and indexing coverage |
llms.txt |
A curated reading list for AI | LLM tools and AI crawlers | What content is easiest for AI to understand and cite |
If you already have a broken sitemap and a robots file that looks like it was written during a panic in 2014, fix those first.
Does your business actually need one?
Sometimes yes. Often no. Here’s the blunt version.
You probably should add llms.txt if:
- You’re in a competitive service space (legal, finance, health, home improvements).
- People ask AI stuff like “best [service] near me” or “who can I trust for [problem]”.
- You publish content that answers customer questions properly.
- You’ve got multiple locations, multiple services, or anything that’s easy to misinterpret.
You can leave it for now if:
- You don’t even have decent service pages yet.
- Your site is basically one page, one phone number, and vibes.
- You’re not getting the basics right (Google Business Profile, reviews, proper titles, decent content).
Also, if you’re still asking “do I even need a website?”, handle that first. This piece is actually decent and practical: do I need a website?
No website, no authority. No authority, no AI trust. Simple.
What should you put in llms.txt?
Keep it tight. Keep it useful.
Your goal is to give AI the pages that explain:
- Who you are
- What you sell
- Where you sell it
- Why anyone should believe you
- How to contact you
A solid starter list for a local business:
- Your main service pages (the ones that make you money)
- Your main location page(s)
- Your About page (with real credibility, not “we’re passionate” nonsense)
- A pricing page (even if it’s ranges)
- A proper FAQ page
- Reviews/testimonials page
- Contact page
Here’s an example structure (don’t copy-paste blindly, you’ll look like a clown):
# llms.txt for Example Business Ltd
## What we do
We provide emergency and planned plumbing services across Cheshire, including Nantwich, Crewe, and Chester.
## Best pages to read
- https://example.co.uk/plumbing/
- https://example.co.uk/boiler-repairs/
- https://example.co.uk/emergency-plumber-nantwich/
- https://example.co.uk/areas/cheshire/
- https://example.co.uk/pricing/
- https://example.co.uk/reviews/
- https://example.co.uk/faqs/
- https://example.co.uk/contact/
## Proof and policies
- https://example.co.uk/about/
- https://example.co.uk/terms/
- https://example.co.uk/privacy/
If you’ve got a big site, don’t dump 400 URLs in there.
Give it the “money pages” and the trust pages.
How do you add llms.txt without breaking your site?
This is the rare SEO job that doesn’t require a spreadsheet the size of Winsford.
You:
- Create a plain text file called
llms.txt - Upload it to your site root (same place as
robots.txt) - Check it loads with a 200 status (not 301, not 403, not “lol 404”)
If you’re on WordPress, you can usually add it via your hosting file manager.
If your developer says “that’s impossible”, they’re either lying or useless.
What’s a real-world llms.txt example with numbers (that isn’t made up)?
In March 2026, I added llms.txt to 6 client sites.
Not a “strategy sprint”. Not a 12-week roadmap. Just the file.
Each file included 12 to 19 hand-picked URLs, mainly service pages, location pages, reviews, and FAQs.
Time spent was about 15 to 30 minutes per site, because we already knew which pages made money.
That’s the bit most businesses miss.
They want shiny technical tricks, but they haven’t even built the right pages yet.
How long does it take to see results?
If you’re expecting a graph that shoots up and to the right in 48 hours, go and buy crypto.
There’s no universal “llms.txt ranking” report.
What you can do is watch for:
- AI crawlers hitting your site in server logs
- Your brand being cited more accurately in AI answers
- More impressions and clicks from AI-driven surfaces (where you can measure them)
Realistically, you’re looking at weeks to months, and only if the rest of your marketing and SEO isn’t a mess.
Will llms.txt replace proper SEO?
No.
llms.txt is a signpost.
If the road behind it is full of potholes (thin pages, weak local signals, no proof, no links, no clear location targeting), you’re still not getting picked.
If you want help getting your business recommended by AI properly, not just “adding a file and praying”, that’s literally what I do with AEO/GEO optimisation.
What are the most common llms.txt mistakes?
I’ve already seen people balls this up in predictable ways.
- Listing every URL like it’s a sitemap. It’s not.
- Linking to weak pages (thin service pages, outdated blogs, tag archives).
- Forgetting location clarity, especially if you serve multiple towns.
- No proof pages (reviews, case studies, accreditations). AI loves proof.
- Treating it like a magic button and ignoring the rest of the site.
If your site can’t convince a human, it won’t convince an AI.
Frequently Asked Questions
What is llms.txt used for? It’s used to guide AI tools to your best pages, so they can understand and cite your business more accurately.
Do I need llms.txt for Google rankings? Not directly. It’s not a classic ranking factor like links or relevance, it’s more about AI readability.
Where does llms.txt go on my website? In the root of your domain, like https://yourdomain.co.uk/llms.txt.
Can llms.txt block AI bots from crawling my site? No. That’s what robots.txt is for. llms.txt is guidance, not enforcement.
Should small local businesses bother with llms.txt? If you’re already doing solid SEO and you care about AI search visibility, yes. If your basics are broken, fix those first.
What pages should I include in llms.txt? Your main services, key locations, About, pricing, reviews, FAQs, and contact pages.
If you want, I’ll tell you in about five minutes whether llms.txt is worth doing for your site, or whether you’ve got bigger problems (you probably have). Drop me your URL and I’ll have a look. No fluff, no sales script.
