Post-flop Aggression Factor?

Hi, I have gametime+ and one of the stats is post-flop aggression factor.
can somebody give me a brief description of what it is?

post flop aggression factor is (bets+raises)/calls . Do you play limit or No limit? An aggressive no limit player will have a AF of over 3. I don't play limit couldn't tell you much there. In poker tracker, general tab -- more detail, will so you a report with this display/described on it.

Oh, that helps a lot, thanks!
I play no limit.