In this video Jay Golden talks about what the numbers on a golf ball mean. The different numbers do not mean that the ball is a different weight or size or dimple pattern. The major purpose for different numbered balls is so that you know your ball when you are playing golf. If two players have the same numbered ball normally a dot is put on one of the balls with a magic marker so that you can know which ball belongs to each player. If you hit the wrong ball it's a two stroke penalty. If you are hitting a provisional ball you will want to know which one was your original ball also. So pay attention to those numbers so you know which ball is yours.