Better alignment leads to better putts. By giving you clear visual feedback before you stroke, this marker helps you commit with confidence and roll the ball more consistently.It's a real spirit level built into a golf ball marker. The bubble shows you the slope direction before you putt — the same physics a construction level uses, applied to reading greens. It won't fix a bad stroke but it gives you accurate information instead of a guess. Most golfers who try it on the first round don't putt without it after that.