A citation hook is a quotable, self-contained piece of content that AI systems readily lift and cite, such as a clear statistic, a crisp definition, an original data point, or a concise direct answer. It is the unit of content most likely to be pulled into an AI answer.
For brands, deliberately writing citation hooks is a practical tactic for earning AI citations. The Princeton GEO research found that adding statistics, quotations, and citations to a page meaningfully increased its visibility in generative answers. Including specific, sourced, self-contained facts gives AI systems something concrete to quote and attribute to you, rather than a vague passage they would paraphrase without credit.