Exit speed is the speed of the ball after it hits the bat.
Bat speed creates exit speed.
Generally, a high school softball hitter who can legitimately hit 70mph on the radar gun increases their chances of playing DI softball.
Many college players average in the 65-73 range.
Exit Speed required at college level
D1 = 70+ MPH
D2 = 67+ MPH
D3 = 65+ MPH