1) .NET MAUI is a new cross-platform framework from Microsoft that allows developers to build applications for mobile and desktop using one shared codebase.
2) It uses C# and XAML to create apps that can run on iOS, Android, Windows, and macOS from a single project. Developers can share code, tests, and UI between platforms.
3) .NET MAUI provides features like advanced layout engines, data binding, and cross-platform graphics APIs to simplify development. It also allows accessing native device capabilities while sharing business logic across platforms.