What is the purpose of a class using the 'data' keyword in modern programming languages?

A class with the data keyword (for example, in Kotlin) is intended for storing data and automatically provides standard methods that are usually written manually:

• equals() and hashCode() for object comparison and use in collections
• toString() for convenient content output
• copy() for creating copies with the ability to modify some fields
• Methods for destructuring

This significantly simplifies working with data container classes, reducing boilerplate code and increasing readability.