In this Unreal Engine tutorial, we’ll explore how to use Blueprint Interfaces to create clean, modular communication between different actors in your game. You’ll learn how Interfaces allow Blueprints to send and receive messages—without needing direct references—making your projects easier to scale and manage.
https://dev.epicgames.com/community/learning/tutorials/JWla/intro-to-interfaces-in-unreal-engine-blueprint-communication-made-simple