do you have Poker Tracker?

those numbers are VP$IP/PFR/AF

VPIP = volentarily put $$$ in pot (as a percentage). In other words how tight/loose they are. This is almost the same as the percentage of flops they see.

PFR = Percentage of hands raised preflop.

AF = Aggression Factor. The ratio of bets and raises to checks and calls. The higher it is the more aggressive they are.

Generally Tightish players will see less then 20-25% of flops with 25% being reasonably loose. Decently aggressive players will raise at least 7% with good players usually having their PFR within a few percentage points of their VPIP.