This document provides an overview of VMware virtualization technology. It discusses that virtualization involves creating virtual representations of hardware instead of physical ones. It then covers key virtualization concepts like hypervisors, ESXi, vCenter, and how they enable the virtualization of applications, servers, storage and networks. The document also summarizes several key VMware virtualization features such as vMotion, Storage vMotion, High Availability, Fault Tolerance, vSphere DRS and vSphere distributed switches. It explains how these features provide benefits like reduced costs, increased efficiency, agility, scalability, availability and simplified management.