For each Twitter profile you connect, both your own and your competitors', you get elaborate analytics. Top tweets, evolution of the profile (follower growth, activity, replies, mentions, etc.), comparisons between different profiles, and much more.
Stay up to date of new checkins or photos at Foursquare venues and be notified of tips people leave. Easily compare the popularity of venues and see which users engage the most with the different venues.
Adding a LinkedIn group to one of your topics, allows you to access separate statistics about the activity in this group.
Connecting Google+ pages to your topics means you can access valuable analytics: your top posts, the top users interacting with your page and much more.