poker tracker stats??? a little help???

i have yet to purchase poker tracker as i live a 4 minute walk from a local b+m and typically only play online when i'm lazy/sick... can anyone offer me some help as to what these statistics mean???

in a recent post someone said his opponent was 63/50/13...

any insight would be appreciated...thanks in advance

[damaniac]

VPIP/PFR/postflop aggression (I think)...
VPIP is % of times villain voluntarily puts money in the pot.
PFR is the % he raises preflop
postflop aggression is times he bets + times he raises all divided by times he calls

thanks.... much appreciated... now i'll finally be able to know what you online grinders are talking about