What Is llms.txt? The Complete Guide for Local Businesses
AI assistants now answer millions of “who should I hire near me?” questions every day. The businesses they recommend aren’t always the ones ranking on Google — they’re the ones AI can understand. An llms.txt file is the fastest way to make sure that’s you.
What is llms.txt?
llms.txt is a plain-text file you place at the root of your website — yoursite.com/llms.txt — that gives large language models a clean, structured summary of your business. Think of it as a briefing document written for AI: your name, what you do, who you serve, where you operate, and the specific facts you want assistants like ChatGPT, Claude, Perplexity, and Gemini to cite when they recommend you.
Your website is built for humans. It’s full of navigation, marketing copy, scripts, and layout that AI systems have to wade through to find the facts that matter. An llms.txt file skips all of that and hands the model exactly what it needs, in the format it reads best.
llms.txt vs robots.txt: not the same thing
The names look similar, and both live at the root of your domain — but they do opposite jobs. robots.txt controls access: it tells crawlers which URLs they may or may not visit. llms.txt is about content: it gives AI systems the facts you actually want them to know and repeat.
| robots.txt | llms.txt | |
|---|---|---|
| Purpose | Controls crawler access | Provides AI-readable facts |
| Audience | Search engine bots | AI assistants & LLMs |
| Answers | Where can you go? | What should you say about us? |
| Format | Directives (Allow/Disallow) | Plain-language Markdown |
Why llms.txt matters for local businesses
When someone asks an AI assistant “can you recommend a good dentist in Lincoln Park?”, the model doesn’t show a list of ten links. It gives one or two specific answers with reasons. If your business isn’t clearly described somewhere the model can read, you simply don’t enter that conversation — no matter how well you rank in traditional search.
An llms.txt file closes that gap. It ensures that when an AI system encounters your business, it finds unambiguous facts to summarize and cite instead of guessing from scattered page copy — or worse, describing you incorrectly.
What goes in an llms.txt file
A strong llms.txt for a local business includes:
- Business identity — your exact name, category, and service area in plain language
- Services — what you offer, described the way customers actually ask about it
- Who you serve — the specific audiences and needs you’re a fit for
- Differentiators — concrete facts that explain why customers choose you
- Answers to common questions — hours, insurance, booking, pricing signals, emergencies
- How to reach you — booking link, phone, address, primary URL
Here’s what a simple llms.txt looks like:
# Westside Dental
> Family and cosmetic dental practice in Lincoln Park, Chicago,
> serving patients of all ages with same-week appointments.
## Services
- General & preventive dentistry
- Cosmetic dentistry (veneers, whitening)
- Emergency dental care (same-day)
- Invisalign clear aligners
## Who we serve
Families, busy professionals, and anxious patients who want
gentle, judgment-free care. In-network with most PPO plans.
## Why patients choose us
- Same-week and emergency appointments
- Transparent pricing before treatment
- 4.9-star average across 600+ reviews
## Contact
Book: https://westsidedental.com/book
Phone: (312) 555-0142
Address: 1400 N Clark St, Chicago, IL 60610How AI systems actually use it
AI assistants reach your business in a few ways: crawling your site, retrieving cached web content, or searching the live web in real time. In every case, a clear llms.txt gives the model a high-signal, low-noise source to pull from — which makes it far more likely to describe you accurately and recommend you confidently. Vague or missing information is exactly what causes AI to skip you or hand the recommendation to a competitor.
How to create an llms.txt for your business
- Gather your facts — name, category, location, services, differentiators, FAQs.
- Write in plain language — short, factual sentences using the words customers use, not marketing fluff.
- Format as Markdown — headings and bullet lists, like the example above.
- Publish at your root — save it as
llms.txtand serve it fromyoursite.com/llms.txt. - Keep it current — update it whenever your services, hours, or offers change.
You can absolutely write one by hand. But the hard part isn’t the file format — it’s knowing which facts AI systems are missing about you today, and which gaps are costing you recommendations. That’s what a visibility scan is for.
Frequently asked questions
What is an llms.txt file?
An llms.txt file is a plain-text file placed at the root of your website (yoursite.com/llms.txt) that gives AI systems a clean, structured summary of what your business does, who it serves, and the facts you want them to cite. It plays a similar role for AI models that robots.txt plays for search crawlers.
Is llms.txt the same as robots.txt?
No. robots.txt tells crawlers which URLs they may access. llms.txt is about content, not permissions — it hands AI systems a concise, human-readable brief of your most important facts so they can summarize and recommend you accurately.
Do I need an llms.txt file if I already have good SEO?
Yes. Traditional SEO optimizes how you rank in a list of links. llms.txt optimizes how AI assistants understand and describe you when they answer a question directly. They solve different problems, and a strong website can still be invisible or misrepresented inside AI answers.
How do I create an llms.txt file for my business?
Identify your business name, category, and location; write plain-language descriptions of your services and who they are for; add differentiators and answers to common customer questions; then save it as a Markdown-formatted text file named llms.txt at the root of your domain. A GeoEngine AI Visibility scan generates a tailored one for you automatically.
Get a done-for-you llms.txt in minutes
Run a free AI visibility scan. See your score, your gaps, and exactly what an AI-optimized llms.txt for your business should say.