A simple example, suppose I throw a couple of darts at a board. I hit the bull's eye once, but I have a lot of scattered hits on the board. Accuracy is that I hit the bull's eye. Now, suppose I throw the darts again, but they all land slightly off from the bull's eye in the SAME place. This represents precision. The great part about precision is that it can be offset so that the darts will hit the bull's eye. This is why precision is more important than accuracy. http://www.tutelman.com/golf/measure/precision.php