A system and method for serving related content via a content sharing service are provided. The system includes a monitoring module to monitor content and shared content being served; an interaction detection module to detect an interaction with the shared content via the content sharing service; a related content analyzer to analyze the monitored shared content, the detected interaction, and based on the analysis, to determine whether additional related content items are added to a related content list; and a related content list generator to generate an updated related content list with the additional related content items and the related content list.