An AI citation occurs when an AI system such as ChatGPT, Gemini, Claude, or Perplexity shows in its answer where a piece of information comes from. For businesses, it is a particularly tangible part of their AI visibility: the answer points to their website as a source, and anyone who wants to learn more lands right there.
AI citation or mention
Not every appearance in an AI answer is a citation. There are two distinct outcomes:
- AI citation: The answer gives a page as a source, with a link, a footnote, or a source card.
- Mention: The answer names a brand or offering in the text, for example as a recommendation or in a list, without giving a source. Such a mention is not a citation.
The two occur independently. A website can serve as a source without the brand appearing in the answer text. Conversely, a brand can be recommended without any of its own pages being given as a source. Anyone who monitors their visibility in AI systems should therefore track citations and mentions separately, for example as citation rate and mention rate.
When AI systems show sources
Whether an answer shows sources depends on where its knowledge comes from: when an AI system bases the answer on content it retrieves from the web for it (grounding), it typically shows the pages it used as sources; when a language model answers from its parametric knowledge alone, there is usually no source reference. How these sources are presented differs between systems and interfaces.
What improves the chances of being cited
An AI system can only cite what it can retrieve, understand, and clearly match to a question: pages that AI crawlers may fetch under a site’s robots.txt rules, passages with high citability, unambiguous information about the provider and offering, for example as structured data, and a presence on platforms that AI systems themselves draw on as sources. None of this guarantees an AI citation, but these conditions are at the core of every GEO strategy.