Basically, RPing = recreating different stories with new characters. Kinda like fanfiction, if you write that, but with many people adding parts. Here I'll give you an example:
Ok in this sample, my character will be called BOB and the other character will be JOE and later MAX will join in.
Bob--
Run. I must run. "HELP!" I call again. Then I take off. One way to go; OUT. OUT of this situation, OUT of this body, and OUT of this life, would be best...
Then the user who made JOE comes in
Joe--
Oh gosh. Someone is calling help. I know I must go. I take off and chase after the calls.
See? I linked the help part.
Max--
My prey was two steps away. So close. I had to snatch him!!!
Max was the bad guy, chasing Bob to begin with. it all ties together!
by the way, RPing isn't EXACTLY a game. more... well, role-playing.
you are playing another role