8-Ball is a billiard game played with a cue ball and 15 billiard balls on a pool table with 6 pockets. It is arguably the most popular bar table pool game today.
The balls numbered 1-7 are solid in color and are often referred to as "low balls" or "solids". The balls numbered 9-15 are striped and are often referred to as "high balls" or "stripes". The 8-Ball, though solid black, is not considered one of the solid balls. You begin a game by racking the balls into a triangle with the 8-ball placed in the center.
The balls are then broken apart using the solid white cue ball. Through this break, or by legally pocketing a "stripe" or "solid" ball after the break, that category of balls is assigned to the player. A legal shot consists of a player using a pool stick to drive the cue ball into one of their category of balls in an attempt to sink it into one of the 6 pockets. A player's turn ends when they fail to do this or commit a foul, such as pocketing the cue ball. The object of the game is shoot in your category of balls, and then pocket the 8-ball before your opponent does the same.