Those are incase someone tries to use your name as a troll tripcode is like a password all you need is an exclamation, and the pass immediately after your chosen name. Ya dont want people to mess your rep atleast thats there to protect ya, the numbers next to the ID thing on the right is a scrambled up id that doesnt change unless you access from a diff IP.
Tripcodes are just example : apple!kittens will become something like apple!7s.F0jT it will have its random letters numbers and symbols so if someone didnt look like that was like kittens!8djaZ.C ya know they were fake
