Windows Deployment Services (WDS) is a Microsoft technology that allows network-based installation of Windows operating systems. It simplifies the deployment process by enabling administrators to set up and manage operating system images on a server, which can then be accessed by client computers over the network. WDS supports both PXE booting and multicast transmissions, making it efficient for deploying multiple systems simultaneously. This tool is particularly useful in enterprise environments, where it helps reduce the time and effort required to install and configure Windows on numerous machines.