PLEASE tell me what the numbers represent!

[pocketjacks]

I am getting back into limit after some time off, and have been reading a lot of the posts here and keep seeing facts such as
"villain is 33/4/0 after only 16 hands"

Stuff like this.
Can someone please explain what the 3 numbers represent.
What they mean?
Finally how do I find them for my opponents? Do I need to buy Poker Tracker?

Thanks in Advance.

[KinkyKid]

Buy pokertracker
x/y/z

x = voluntarily put money in pot %
y = preflop raise %
z = post flop aggression factor

[pocketjacks]

[ QUOTE ]
Buy pokertracker
x/y/z

x = voluntarily put money in pot %
y = preflop raise %
z = post flop aggression factor

[/ QUOTE ]

Thanks!! thats all I need to know!