A system including a processor and a memory storing instructions that, when executed, cause the system to: receive a stream of content including a plurality of content items; retrieve a plurality of related content items; identify a topic for at least one of the plurality of the related content items; rank the topics by relevance to the user and one of the plurality of items; associate the topic to the content item in the stream of content where the topic is ranked as being relevant to the content item; generate a marker for the topic; generate an interface including the marker associated with the content item in the stream of content; and provide the interface for display.