A libero is a defensive specialist in indoor volleyball. The position was added to foster rallies and to make the game more exciting overall.
The Libero in Volleyball – The Most Comprehensive Guide
What is a Defensive Specialist in Volleyball? - Volleyball Blaze
Nebraska volleyball season in review: Defensive specialist
Defensive Specialist
High school volleyball positions and who plays them
Cowley volleyball team signs libero/defensive specialist from Arkansas - Cowley Tigers Sports
Defensive Specialists In Volleyball – Better At Volleyball
LePore Named America East Defensive Specialist of the Week - University of New Hampshire Athletics
Defensive Specialist
The Libero in Volleyball – The Most Comprehensive Guide