A PLAIN ANSWER
What is AI visibility?
AI visibility is whether an AI assistant, ChatGPT, Perplexity, Claude, or Google’s AI Overviews, can actually find your website, read it correctly, and describe your business accurately when someone asks. It is related to search engine optimization, but it is not the same thing, and a site can be doing fine on one and badly on the other.
HOW IT IS DIFFERENT FROM SEO
Traditional search ranks a page. AI visibility describes a business.
Traditional SEO is mostly a ranking problem: get your page to appear as high as possible on a results page a human will scroll through. AI visibility is closer to a comprehension problem. An AI assistant reads a much smaller slice of your site, has to decide what to trust, and then has to compress it into a sentence or two it hands to someone who never visits your site at all. If it gets your hours, your service area or your pricing wrong in that sentence, you never find out, because there is no click to measure.
That makes AI visibility partly about being crawlable at all, and partly about being unambiguous once you are.
THE MECHANICS
What actually determines it
- Can the AI crawler even reach the page
Robots.txt, a security plugin, or a CDN bot-blocking setting can silently stop an AI crawler before it ever sees your content, often without anyone deciding that on purpose. See which crawlers exist and what each one actually does.
- Can it read the page cleanly once it arrives
Content buried behind JavaScript that never renders in a simple fetch, or a page with no clear heading structure, is much harder for an AI system to summarize correctly than a plain page with a clear H1, real paragraphs and a sensible order.
- Does structured data remove the guesswork
Schema markup, LocalBusiness, FAQ, Organization, tells an AI system your name, address, hours and services directly instead of making it infer them from marketing copy. It is the difference between a system quoting you accurately and a system paraphrasing you into something slightly wrong.
- Does an llms.txt make the summary easier
An llms.txt file is a short, plain-text brief written for AI systems instead of for search engines. It is not required and its effect is still unproven, but it costs little to publish. See what it is and what belongs in one.
Search and AI visibility is the whole business
This is not a side topic for me, it is the positioning of everything I do: search and AI visibility for small businesses. The free health check includes a specific check for whether AI crawlers can read your site and whether you publish an llms.txt, alongside the more familiar SEO basics, because both now decide whether a stranger finds you at all.
Bill
Next step: run the free check to see whether AI crawlers can currently read your site. For the crawler-by-crawler detail, see AI crawlers, explained. For the llms.txt piece specifically, see what is llms.txt.