Volleyball was invented in 1895 by William Morgan as an indoor winter sport. It is played by two teams on a rectangular court divided by a net, with the objective being to ground the ball on the opponent's side. A game is won when a team scores at least 2 more points than the opponent to reach 15 or more points. Volleyball involves skills like serving, passing, setting, spiking, and blocking to advance the ball over the net. The rules have evolved over time, with recent changes including allowing libero substitutions and letting players double hit on first ball contact.