Volleyball is an Olympic team sport in which two teams of six active players, separated by a high net, each try to score points against one another by grounding a ball on the other team's court under organized rules. 

Through time, volleyball has developed to involve common techniques of spiking, passing, blocking, and setting, as well as specialised player positions and offensive and defensive structures. Because many plays are made above the top of the net, vertical jumping is an athletic skill emphasised in volleyball. This article focuses on competitive indoor volleyball, which is carefully regulated and played indoors. Numerous variations of volleyball have developed for casual play, as has the Olympic spin-off sport beach volleyball.