A tip is similar to a spike, except instead of hitting the ball as hard as possible the player pokes the ball to just tip it over the net. You can use either your finger tips or your knuckles to play this shot. A tip can be very effective when there is a hole in the oppositions defence. It can also be used as a last resort to get the ball over the net when you are slightly out of position to play the ball. Eg when the attacking player has mistimed their approach or the set is too close to the net or too low.