The team that has the volleyball on their side of the net is on offense. Players on offense are called offensive players.
The goals of a volleyball team while on offense are:
While on offense, a team achieves these goals by carefully deciding who hits the ball and when to set up an attack hit near the net.
In volleyball, teams are constantly trading ownership of the ball. So each time the ball goes over the net, teams are switching from being on offense to being on defense. This means that players must be quick on their feet and have to communicate well with one another to cover the court after hitting the ball over the net.