Short for “set and bump,” it is the second contact a player makes with the ball in volleyball following the serve.  The first contact is not considered a hit but rather part of the service action, including footwork and body position.  A set is an “attack” of the ball, which involves a player’s hitting motion and must have minimum knee bend. Following a successful service, the attacking team gains the right to take one uninterrupted opportunity to attack the ball for a second time.