What is the role of ViewModel in application architecture?

The ViewModel in application architecture (for example, MVVM) is responsible for preparing and managing the data that is displayed in the View. It acts as an intermediary between the data model and the user interface, ensuring the separation of presentation logic from business logic and data. The ViewModel processes data, transforms it into a user-friendly format, and notifies the View of any changes, which promotes a cleaner and more testable architecture.

Example: if you have a list of users, the ViewModel can fetch data from the model, filter or sort it, and then provide a ready-to-display list in a table.