The vocabulary
The four things that decide whether AI names you.
The concepts behind AI visibility, in plain English.
- AI visibility
- AI visibility is how often AI chatbots like ChatGPT, Gemini, Claude, and Perplexity recommend a specific business when their users ask for suggestions. Unlike traditional SEO, it depends on structured data, mentions on sites like Reddit and Wikipedia, and AI-readable content, not Google rankings.
- llms.txt
- llms.txt is a plain-text file at the root of a website (yoursite.com/llms.txt) that gives AI crawlers a structured summary of a business and a directory of the pages they should read. It is the AI-era equivalent of robots.txt and sitemap.xml combined, designed to make a site easier for ChatGPT, Perplexity, and other AI systems to understand.
- Generative engine optimizationGEO
- Generative engine optimization (GEO) is the practice of optimising content, structured data, and brand signals so that generative AI systems including ChatGPT, Perplexity, Gemini, and Google AI Overviews cite, reference, or recommend a business in their answers. GEO replaces traditional SEO for queries answered directly inside an AI chat instead of a Google results page.
- Answer engine optimizationAEO
- Answer engine optimization (AEO) is the practice of structuring web content so AI answer engines can extract a direct, quotable answer. It overlaps with GEO but focuses on the 40 to 60 word capsule the model lifts verbatim, rather than full-page recommendations.