What is angle of attack in golf?

The vertical angle at which the clubhead approaches the ball at impact.

Angle of attack, defined

The vertical angle at which the clubhead approaches the ball at impact. Positive = ascending (driver). Negative = descending (irons).

Tour averages

PGA Tour driver average is -1.3 degrees. LPGA Tour average is +3.0 degrees. The difference is significant: at 100 mph club speed, TrackMan optimization data shows a 25-yard carry difference between the two averages at the same swing speed.

How to fix yours

Move the ball forward in the stance and raise tee height. Those are the two fastest ways to shift angle of attack toward positive numbers.