What is the role of a data object in a system and in what scenarios is it used?

A Data Object in Android is a structure or class used for storing and transferring data within an application. It typically contains only fields and access methods (getters and setters), without behavior logic.

Use cases:

• Transferring data between Activities or Fragments via Intent or Bundle.
• Storing UI state.
• Modeling data received from a database or network.

For example, a user model class:

data class User(val id: Int, val name: String, val email: String)

Such an object is convenient for passing information and working with it in the application.