MVVM, or Model-View-ViewModel, is a software architectural pattern commonly used in application development. It separates an application into three main components: the Model, which represents the data and business logic; the View, which is the user interface; and the ViewModel, which acts as an intermediary between the Model and View. This separation helps manage complex applications by promoting organized code and easier maintenance. In the MVVM pattern, the ViewModel binds to the View and provides data and commands, allowing for a more dynamic user experience. Changes in the Model automatically update the View through data binding, reducing the need for manual updates. This structure enhances testability and supports the development of responsive applications.