Embodiments of the invention are generally related to metadata describing users accessing a network and network content. Each user may have a user profile comprising a list of user tags describing the user. Each item of network content may include a list of content tags describing the item. When a user selects an item of network content, one or more tags from the user profile may be added to the list of content tags for the item. In some embodiments, one or more tags from the list of content tags may be added to the user profile. Therefore, over time and access by multiple users, a comprehensive list of tags describing user profiles and network content may be developed.