.NET MAUI allows developers to build mobile apps for iOS, Android, Windows, and macOS from one C#/XAML codebase, providing a faster and more lightweight alternative to Xamarin.Forms. It uses platform-specific handlers rather than renderers, requires .NET 6 rather than .NET Standard 1.0, and uses a single project rather than multiple projects. Everything that can be done in other languages like Objective-C, Swift, Java, and Kotlin can be achieved using C# and .NET MAUI.