Like all poker stats in tracking software, PFR is an abbreviation that stands for pre-flop raise.  In the simplest of terms, PFR tells you what percentage of all hands a poker player enters by raising before the flop.

For example, if you played 10 hands of poker, limped 2, raised 3, and called 1 preflop, you would have played 6 out of 10 hands, so your VPIP stat would be at 60%. PFR stands for Pre Flop Raise and is a statistic that calculates the percentage of hands you raise with preflop.