Gridiron Football is a popular team sport played primarily in the United States and Canada. The game is played on a rectangular field, 100 yards long, with two end zones. Each team has 11 players, and the objective is to score points by advancing the ball into the opponent's end zone, either by running or passing. Points can be scored through touchdowns, field goals, and extra points. The game is divided into four quarters, each lasting 15 minutes. Teams take turns on offense and defense, with the offense trying to move the ball down the field while the defense aims to stop them. Key elements include the quarterback, who leads the offense, and the line of scrimmage, where each play begins.