The goal is the intention of an activity or a plan. In a figurative sense, a goal is the mission of a person or group. A tangible goal could be the net at one end of a soccer field. Your goal is to kick the ball into the net, and then you will have scored a goal.
Goal used to mean "the end point of a race." When you score a goal during a sporting event, the play does momentarily stop. If your goal is to win the presidency and you are in fact elected, you have achieved that goal. A goal is the reason for your efforts. People set goals in all aspects of their lives, not just in scoring points. "Her goal is to eat 40 cupcakes in one day." Go figure.