Golf is a game of technique. A good golf swing is one fundamental skill that all successful golfers need to master. While even the most successful golfers may struggle with their swings occasionally, one of the quickest ways to derail a golf swing is lateral sway during the backswing. This can cause your ball to veer off course and land far from the green or your intended target. It also robs you of club head speed which could otherwise power the ball further down the fairway.