
Underneath this section is the recent activity of your friends. It displays recent actions by your friends in specific games or apps. Under that is a section displaying the top games your friends play. Finally, at the bottom, is a directory of top games and apps.
To keep users engaged with the dashboards, Facebook has implemented “counters” in the left hand menu. Essentially, they are notifications letting you know how many active actions you can take in your favorite games and apps.
Overall, this seems like a good move for increasing app engagement, something developers desperately want. It’s clean and organized, but that doesn’t mean users will latch onto the idea of dashboards. Time will tell whether users adopt them as part of their daily Facebook routine.
source : http://mashable.com/2010/01/21/facebook-dashboard/