The Citation dimension systematically monitors which domains, pages, and URLs AI search engines retrieve and cite when answering user queries across platforms like Google Gemini, OpenAI ChatGPT, and Anthropic Claude. By parsing grounded search responses, Auxy separates selected versus unselected citations to evaluate whether retrieved source material is actively cited or discarded. These audit trails feed into the Content Optimizer, which iteratively rewrites and tests page content to improve extraction probability, while the Veracity engine measures how faithfully the model represents the cited source.