looking for a break down of the meanings of VPIP/PFR/AF #'s

I got PT and PA hud, i get these #'s but i dont really know how to use them to my advantage. Is there a post or a site that breaks down each value by range which defines what type of player i am dealing with? I see people saying things like "an X/X/X player wouldn't do X". i would like to be able to have an understanding of these values like they do.

[krimson]

vp$ip = Voluntarily put $ in pot (pre-flop), basically shows how loose/tight a player is pre-flop.

Pfr% = Pre-flop Raise %, how many of their hands do they raise pre-flop. Shows how aggressive they are pre-flop

AF = Agression Factor. This is a ratio of bet/raising to calling. The higher the AF, the more aggressive they are.