Hyper-V is a virtualization technology developed by Microsoft that allows users to create and manage virtual machines (VMs) on a physical server. This enables multiple operating systems to run simultaneously on a single hardware platform, optimizing resource usage and improving efficiency. With Hyper-V, users can easily set up, configure, and manage VMs through a user-friendly interface. It supports various operating systems, including Windows and Linux, and offers features like live migration, which allows VMs to move between physical hosts without downtime, enhancing flexibility and reliability in IT environments.