vMotion is a technology used in virtualization that allows the live migration of virtual machines (VMs) from one physical server to another without downtime. This means that users can continue to access applications and services while the VM is being moved, ensuring seamless operation. This process is beneficial for load balancing, maintenance, and disaster recovery. By using vMotion, system administrators can optimize resource usage and improve overall system performance, as it enables them to redistribute workloads across servers efficiently.