Soccer is a game played on a rectangular field by two teams of 11 players. The players may touch the ball, but not with anything from their shoulders to their hands. Each team has a goal they defend, and each team tries to get the ball to go into the other team's goal.
There is one player who is allowed to touch the ball with any part of his body, he is called the goalie, and he must stay near his own team's goal.

The word soccer comes from the phrase association football, which was what this game was originally called. In most of the world, this game is called football, but in the USA it is called soccer.