Typically, football refers to a game played with a round ball that is covered in leather. The rules are regulated by a referee who keeps track of time. The main aim of the game is to score more goals than your opponent in 90 minutes of playtime.
The offensive team begins the play by setting up in their offensive formation. The quarterback lines up directly behind the center. He then throws the ball to a running back or wide receiver. The quarterback is the most important player on the field.
The defense tries to stop the offense from scoring and keeps the ball out of the end zone. They may block the quarterback or cover potential receivers. If the defense makes an interception, they can run with the ball until they are forced out of bounds. The defense may also rush the quarterback to prevent him from throwing the ball.
An incomplete pass is one that flies out of bounds before being caught. A false start occurs when the offensive player moves after the snap. When an offensive player blocks the defensive player in the back, the block is illegal. This is referred to as a choke block.
In football, the goal is to get more goals than your opponent in a given amount of time. Each team has a playbook, which contains hundreds of plays. Each play should be strategically sound. If the play is not, the offense can repeat the play until they score.