Providing Content Recommendation to Users on a Site

The disclosure includes a system and method for providing content recommendation to users on a site. The system includes a processor and a memory storing instructions that, when executed, cause the system to: receive data describing a page on a site visited by a first user; query one or more sources to retrieve one or more candidate items for the first user; determine one or more source types related to the one or more candidate items; determine one or more scores for the one or more candidate items based on an interest profile and the one or more source types; rank the one or more candidate items; determine that an invitation trigger event causing a presentation of an invitation state occurs; determine that a recommendation trigger event causing a presentation of a recommendation state occurs during the invitation state; and provide a recommendation state to the first user.