The coach throws a ball to the goalkeeper.
At the same time a  runner starts and the goalkeeper passes the ball directly to the runner who continues her run against the opposite goal and shoots.
The goalkeeper must concentrate on the precise passing and place the ball in such a way, that the runner don't have to stop or reduce speed in order to catch the ball.
If the goalkeeper is unable to make a long precise pass, the ball can instead be thrown in such a way, that it drops down in front of the runner, and with so much speed, that the runner can catch up with the ball before it crosses the side line.