Timed metadata is a feature that provides additional context for media content by connecting the timeline of the media to related information. This can include features like "Skip Recap" or "Skip Intro" buttons, interactive transcripts, and educational video content with questions. Mux Player allows users to add out-of-band timed metadata in the form of CuePoints, which have two properties: a time for when the CuePoint begins in the media and a generic value that can store any JSON serializable information. This feature is useful for augmenting, contextualizing, and enriching users' media experiences.