Soccer, also known as football, is the most popular sport in the world. It is played between two teams of 11 players each on a large grass field, with the objective being to score goals by getting the ball into the opposing team's net. The key rule is that players cannot touch the ball with their hands and must instead use their feet, knees, or head. The document then goes on to describe several important skills in soccer, including passing, receiving passes, shooting, dribbling, and techniques used by goalkeepers. It also outlines several fundamental techniques like inside/outside of the foot passes, chipping crosses, drop kicks, throw-ins, and heading the ball.