ViewModels play an important role in ASP.NET Core MVC applications. Entity classes represent database tables, but the data required by a view is often different from the data stored in the database.

For example, an AdminUser entity may contain a PasswordHash field. Sending that entity directly to a view can expose sensitive data unintentionally. A ViewModel allows you to include only the fields required by the user interface.

ViewModels also make validation easier. Create, Edit and List pages can each have their own model, which keeps form handling clean and focused.

In multilingual systems, ViewModels become even more useful. Data coming from BlogPost and BlogPostTranslation can be converted into a simple model before rendering. This keeps the view clean and the controller logic easier to understand.