In a golf ball having a plurality of dimples, a groove having a certain width and depth is formed on a surface of the golf ball, the depth of the groove extending below the surface. A belt having a certain width and height may be formed on a surface of the golf ball, the height of the belt extending above the surface. It is possible to implement an efficient putting practice where a groove or belt is formed on a surface of a golf ball to affect the rolling and movement of the golf ball. The width of the groove or belt may be changed, so that a user selects a certain golf ball based on his practice level. A certain number or symbol may be formed on the groove or belt, so that a user can select a golf ball for practice based on his ability level.