Adds an extra tab in Friends.
This tab can show some additional information about your friends that is not available in the default UI.
The extra information is showing, for all your friends, in which zone they are in as well as what race and class they play.
This could help out in seeing if any friends from the opposing faction are in the same zone for potential ganks.
Or you can keep up with what your friends from the other faction are playing for class and how far they have come in their leveling.