The server can not only be used for battles, but it also has a chat feature where you can chat with fellow PC members.
You can also build teams or even try Random Battles.
There's also different user ranks there:
~ - Administrators
% - Drivers
+ - Voiced
Those without a symbol near their name are regular members, which are therefore the lowest in the rank. There's also rules you have to follow there, alongside the global PC rules.