section: (1) Engagement The term engagement means, with respect to content on a platform, the number of times a user interacts with the content, whether through comments, indications of approval or disapproval (such as likes or dislikes), reshares, or any other form of active interaction. (2) Impression The term impression means, with respect to content on a platform, the display or delivery of the content to a user, regardless of whether the user engages with the content. (3) Prevalence of violating content The term prevalence of violating content means a platform’s estimate of the number of impressions of content that violates its moderation policies among its users, regardless of whether the platform ever identifies that particular content as violating. (4) Reach The term reach means, with respect to content on a platform, the number of users to whom the content is displayed or delivered during a particular period, regardless of how many times it is delivered to them. (5) Real-time understanding The term real-time understanding means an understanding of content on a platform that is up-to-date within less than 24 hours. (6) Reasonably public The term reasonably public means information that the author made available in a manner and under such circumstances such that the author does not retain a reasonable expectation of privacy in the information. The fact that a user may need to register or create an account with a platform to view information does not preclude it form being deemed reasonably public. (7) Recommender or ranking algorithm The term recommender or ranking algorithm means a fully or partially automated system used by a platform to suggest in its online interface specific information to recipients of the service offered by the platform, or to prioritize that information, including as a result of a search initiated by the recipient of the service or otherwise determining the relative order or prominence of information displayed. This includes any computational process, including one derived from