The libero is a very important defensive player that substitutes for another player in the back row (usually the middle blocker/hitter). They're marked by their different colored jerseys and must be the designated libero for that game. The libero can exit and enter without substitution requests. They are the defensive leader and never rotate to the front row. Though libero is Italian for "free", the libero has some limitations: they are not allowed to attack the ball from the front row above the net or block.
There are usually two on the team roster, but only one is allowed on the court at a time. The libero on the court is known as the acting libero, the other is the second libero.
When on offense, the libero's jobs are:
When on defense, the Libero's jobs are:
The libero CAN:
The libero CANNOT:
Each team has to choose a player to be the first and second libero for the rest of the game. Teams are not allowed to switch liberos during a game.
The main role of the libero is to keep the ball in play. This means diving, rolling, and doing whatever is necessary to make a save. Most of the defensive moves in volleyball will be used by the libero.