The term 'Yellow Ball in Pool' can be summed up as a three-letter word: 'CUE'. A CUE is a long stick used to hit a ball in the game of pool. The CUE is usually made of wood and has a leather tip at ONE end. The yellow ball is the object of the game, and it is placed in the center of the pool table. The goal of the game is to use the CUE to hit the yellow ball into ONE of the six pockets located around the edge of the pool table.