Citation (in AI answers)
A citation in an AI answer is a link or named source that an AI system shows as support for its generated response, such as the supporting links in Google AI Overviews or the sources listed by Copilot, ChatGPT and Perplexity.
A citation is how an AI answer points back to the web. Google calls them supporting links: a page can be one if it is indexed and eligible to show with a snippet. Microsoft uses the word citation in Bing Webmaster Tools, whose AI Performance report counts how often a site is shown as a source in Copilot and Bing’s AI summaries.
Why it matters now: in AI search the citation is the unit of visibility. An answer can use a page and satisfy the reader without a click, so being cited, and named, is often the only exposure a source gets. Search Console’s Generative AI performance report counts impressions of links to your site in AI Overviews and AI Mode, which is the closest Google measure of citations.
Citations are not stable. A January 2026 SparkToro and Gumshoe study found under a 1 in 100 chance of ChatGPT or Google’s AI returning the same list of brands twice for the same prompt.
Practical note: measure citation share across repeated runs of the same prompts, and use first-party reports where they exist.