Xamarin Forms allows developers to create native mobile apps for Android, iOS, and Windows using C# and XAML. It enables developers to write shared code that can render a UI across platforms, while still allowing access to native device functionality and features. Some benefits of Xamarin Forms include lower costs through code reuse, a native user experience, leveraging the .NET framework, an extensive community and support, and an easier learning curve compared to other cross-platform mobile development technologies.