Alignment for golf is one of the fundamentals of good golf and is an integral part of a good pre shot routine.
If you are not aligned correctly to your target, it doesn’t matter how good your swing is. E.g. If your body is aimed too far right of the target that your eyes see, the upper body can swing across the lower body, resulting a pull or slice (for a right-hander). The opposite occurs if you are aimed too far to the left of your target.
During the “thinking phase” of the pre shot routine, you’ll be figuring out your strategy and the shot you want to hit, given the situation. One of the pieces of this is aligning to the target you’ve chosen. Greg Norman says that “alignment for golf is the fundamental that requires the most maintenance.” This is why you see Tour players working on their alignment for golf with alignment sticks during their practice.
However, with the proper techniques, it’s possible to get alignment for golf perfect every time, so you can swing with confidence knowing you are set up properly for the shot you want to hit.