Understanding Lie Angle
The lie angle of an iron is the angle made between the ground and the club shaft when the sole of the club rests flat on the ground (as if you were addressing the ball). When this angle is smaller, the lie angle is said to be “flatter.” When this angle is larger, the lie angle is said to be “more upright”
LIE TOO UPRIGHT: Ball will be headed left of the target
If the lie angle is too upright for your swing, you will get heel-heavy divots, the ball will make impact too low on the face, and your shots will tend to fly left of the target.
LIE TOO FLAT: Ball will be headed right of the target
If the lie angle is too flat for your swing, you will get toe-heavy divots and your shots will tend to fly right of the target.
CORRECT LIE: For straight shots
In order to hit straight shots, or at least to be able to control how you shape your shots, the leading edge of the club should be flat against the ground as it penetrates it.