Can you explain the differences between Use Case and Interactor concepts in software development?

Use Case and Interactor are concepts often used in application architecture, especially in Clean Architecture.

• Use Case — describes a specific scenario of system usage, reflecting business logic. It answers the question "what" needs to be done.

• Interactor — is the implementation of the Use Case, i.e., a specific class or component that performs the business logic described in the Use Case.

In simpler terms, Use Case is a concept or contract, and Interactor is its concrete implementation in code. For example, a Use Case might be "User registers," and the Interactor is the class that handles registration, interacts with repositories, and returns the result.