Your activity feed shows you what is happening in your network. You can get here by clicking "HOME" in the header. The center column shows you activity that is happening in your network. You can follow companies, like entries and connect with other members in the feed.
The right column shows your Profile Strength, Profile Level and some tips to strengthen your profile. (The 4 profile strength levels are: Beginner, Rookie, Pro, Champ.)
The left column shows you an Overview of your profile. You can quickly edit this information by clicking the Edit button.