VMware vSphere is a cloud computing virtualization platform that allows users to create and manage virtual machines (VMs) on physical servers. It provides a suite of tools for deploying, managing, and securing VMs, enabling organizations to optimize their IT resources and improve efficiency. The platform includes key components like VMware ESXi, a hypervisor that runs on the physical server, and vCenter Server, which centralizes management of the virtual environment. With vSphere, businesses can easily scale their infrastructure, enhance disaster recovery, and ensure high availability of applications.