The rush to down your opponent, stoping your rival and the clock

The first down is very important in NFL matches. Since the progress in a NFL match is measured in yards the offensive team has to get as much yardage as possible moving closer to the defensive team’s end zone. Every time the ball is in the hands of the offensive team they get four chances or downs to score 10 yards and every time it does so successfully they earn their first down along with a second set of 4 downs. But if they fail to gain the required yardage they lose the possession of the ball to the defensive team. Thus it is the duty of the defensive team to prevent the offensive team from gaining the 10 yards for the first down. When the offense team reaches 4th down successfully, they will punt or kick the ball away forcing the opponent to drive further down.

NFL has specific rules laid down for moving the ball during its matches. NFL matches begin with snap. The place where the game begins on the field is called the line of scrimmage. The quarterback who starts the game shouts loudly to his team players and throws the ball to the player in the front.