What is llms.txt?
llms.txt is a small plain-text file you put at the root of your website, the same way robots.txt has lived there for 30 years. The difference: llms.txt is written for large language models like ChatGPT, Claude, Gemini, and Perplexity, not for search engine crawlers. It gives those AI systems a clean, structured pointer to what your business does, which pages matter, and how to talk about you when a customer asks them a question.
If your business is invisible inside AI chat answers right now, llms.txt is one of the first dials you can turn. It is cheap to add, it does not require redesigning your site, and the AI crawlers are already looking for it.
Why this matters in 2026
Search behavior has shifted. A growing share of buying questions never reach Google at all. Customers ask ChatGPT for the best HVAC company in Boca Raton, they ask Claude to compare three lawyers in Fort Lauderdale, they ask Perplexity to pull pricing for a contractor in Miami. If the AI does not know your business exists, or worse, hallucinates wrong details about you, you lose the lead before you knew the lead existed.
llms.txt is the most direct way to tell those systems three things: who you are, what you sell, and which page on your site is the canonical source for each topic.
What goes inside an llms.txt file
The format is simple Markdown. A typical small business llms.txt looks like this:
# Your Business Name
> One-sentence description of what you do and where you serve.
## About
- Founded: 2018
- Location: Boca Raton, FL
- Services: Local SEO, Google Ads, WordPress design
## Key pages
- [Services](https://yoursite.com/services/): Full list of what we offer
- [Pricing](https://yoursite.com/pricing/): Transparent pricing for all packages
- [Contact](https://yoursite.com/contact/): Get a quote in under 24 hours
## Optional
- [Case studies](https://yoursite.com/case-studies/): Real results for real clients
- [Blog](https://yoursite.com/blog/): SEO and marketing guidance for small business owners
That is the whole file. Less than 30 lines for most small businesses.
Where to put it
Upload llms.txt to the root of your domain. The URL must be reachable at yoursite.com/llms.txt with no redirects, no login, no JavaScript. WordPress, Wix, Squarespace, and Shopify all let you do this either through a file manager, an FTP client, or a custom theme upload. If you cannot get it to the root, the crawlers will not find it.
How llms.txt is different from robots.txt
robots.txt tells crawlers what they are allowed to fetch. It is a wall. llms.txt is a map. It tells AI systems what your site is about and which pages to weigh most heavily when generating an answer. The two files work together, not against each other. You still need a clean robots.txt to control crawl access. llms.txt sits next to it and earns you better citations.
Does llms.txt actually work?
The honest answer in 2026: results vary. Anthropic, OpenAI, and Perplexity have all signaled support, and llms.txt files are showing up in their crawl logs. Google Gemini is slower to commit. Adoption is rising fast, the cost to add it is near zero, and the downside of not having one is your business getting paraphrased badly by an AI that has no canonical source for you.
The smart play is to add llms.txt now, keep it in sync with your site, and track AI referral traffic in your analytics. Even a small lift in citations is worth a one-time 20-minute setup.
How to set it up for your business
Three steps:
- Write a 20-line llms.txt following the structure above. Keep it factual. No marketing fluff. AI systems pattern-match on clear, scannable information.
- Upload it to the root of your domain. Verify yoursite.com/llms.txt loads as plain text in a browser.
- Update it any time you add a major service page, move pricing, or change your business hours.
If your site is on WordPress and you are unsure where to drop the file, this is the kind of thing we handle in our SEO service. We also build the matching schema markup, internal linking, and AEO optimization that helps AI systems trust your site enough to cite it.
Bottom line
Search is fragmenting. Google is no longer the only mouth your customers ask. llms.txt is a five-minute change that puts your small business on the map for the AI systems doing more of the answering every month. Add it, keep it current, and measure the lift.
Ready to make your site AI-ready end to end? Contact SEO Smooth or call (561) 396-2196 and we will audit your site, write your llms.txt, and connect it to the rest of your SEO stack.
