Penalty kick
A penalty kick is awarded for offences taking place in the penalty and goal area. A nominated member of the team awarded the penalty is allowed a strike at goal from the penalty spot (see the image in the ‘field of play’ section), with only the goalkeeper to beat. The goalkeeper must remain on his line until the ball has been kicked, and all other players must be outside the area behind the penalty spot. After he has taken the kick, he cannot strike the ball again without another player touching the ball.
taken from the football rules site.