VMware vSphere Hypervisor is a type-1 hypervisor that allows multiple virtual machines to share the physical resources of a single host machine. It provides a virtualized computing environment that runs multiple operating systems simultaneously on a single physical server. It is a free, bare-metal hypervisor that provides a simplified and cost-effective way to virtualize your servers and run your applications in a virtualized environment. It is part of the VMware vSphere suite of virtualization products and is designed for small businesses or entry-level enterprise needs.