Universal Plug and Play (UPnP) is a set of networking protocols that allows devices on a local network to discover and communicate with each other seamlessly. It enables devices like printers, cameras, and smart TVs to connect without requiring complex configuration, making it user-friendly for home and office environments. UPnP supports various applications, such as file sharing and media streaming, by allowing devices to automatically configure their network settings. This means that when a new device is added, it can easily join the network and interact with other devices, enhancing the overall user experience in a connected environment.