What Does Virtualization Manager Mean?

A virtualization manager is a virtualization environment management application that provides capabilities to create, edit, remove and monitor virtual machines. A virtualization manager provides a complete management solution for many different virtual machines simultaneously through a single application management console.

Techopedia Explains Virtualization Manager

A virtualization manager is an integral part of any computing infrastructure that has one or more virtual machines spread across the network. It controls the allocation of underlying compute, memory, network, storage and other services for all the managed virtual machines.