famepoints and experience points. Famepoints is just a ranking of how well you did in Pvp. you get exp points if you win just like if you defeated a monster of equal size.
malikar

A handy advantage of PvP is that it doesnt use up clicks...

It does use clicks, but only for the agressor. The defending player uses no clicks during PvP

Thanks for the replies, but where should I look for the arrow that indicates I can attack?

next to the player's name on the text screen.
malikar

Thanks Malikar, but all I ever see there is a question mark in brackets. 

R u clicking on the players name on the original screen (the normal one of larkinor)? If so you could be clicking on the person's name... If you do, it will show the box with that persons "stat sheet" and the little ? next to his/her name.
the arrow that I'm talking about is on the original screen. It could be, I suppose, a glitch, but I HIGHLY doubt it.
malikar

Malikar, you were right. I was clicking on the player name and going to that screen.  For some reason I didn't see the little arrow on the player original screen.  Wow, I feel like an idiot!!!  Thanks very much.  This might be fun to do!

you're welcome :)