The MVVM Framework (Model-View-ViewModel) is a software architectural pattern primarily used in developing user interfaces. It separates the development of the graphical user interface from the business logic, making it easier to manage and test applications. The Model represents the data and business rules, the View displays the user interface, and the ViewModel acts as a bridge, handling the communication between the Model and the View. MVVM is commonly used in technologies like WPF (Windows Presentation Foundation) and Xamarin for building applications in the .NET ecosystem. This framework promotes a clean separation of concerns, enhancing code maintainability and enabling easier unit testing.