- The document discusses connecting user profiles to the SharePoint portal through the user profile service application, which contains user profiles, profile synchronization, audiences, my sites, social tags, and the newsfeed. - It provides an overview of the user profile service application and how it connects to my sites, social features, and the skydrive pro document synchronization service. - Key components that the user profile service relies on are also summarized, including the managed metadata, search, and business connectivity services.