UWP Apps, or Universal Windows Platform Applications, are software applications designed to run on various Windows devices, including PCs, tablets, and smartphones. They provide a consistent user experience across different screen sizes and input methods, allowing developers to create a single app that works seamlessly on multiple devices. These apps are built using modern programming languages and frameworks, such as C# and XAML. UWP Apps can access a wide range of device features, like cameras and sensors, and are distributed through the Microsoft Store, making it easy for users to find and install them.