It's a bit like football, but with sticks and a tiny ball, and goalkeepers who wear masks and 35-minute halves. So not that much like football really.
But the point is the same, get the ball in the net to score goals. Whoever scores the most goals wins.
Most of the goals in hockey come from set-pieces like corners.
Goals can only be scored if the ball is struck from inside the scoring circle, which is an arc 16 yards around the goal.
Look out for penalty corners, where one player hits the ball in from the goal-line to some of his pals. They stop it so another player can try to score. Goals are often scored from short corners.