The term "server virtualization" refers to the process of creating multiple virtual servers on a single physical server. This enables better utilization of hardware resources by allowing multiple operating systems and applications to run concurrently on a single machine. Server virtualization enhances flexibility, scalability, and management efficiency in data centers, as resources can be allocated dynamically based on demand. This approach reduces hardware costs and energy consumption while simplifying server management through centralized control. Overall, server virtualization is a cornerstone of modern IT infrastructure and allows for improved disaster recovery and business continuity strategies.