We currently offer three different leaderboards and they are Engagement, Interactions and Followers. To add or remove the leaderboard from showing on your wall, you'll need to go into the edit option for the wall, and then to the Design step. In the Design step, under the Miscellaneous Options section you'll find the toggle to turn it on or off. If turning it on, you'll see a second option appear to pick which type of leaderboard you want to show.