Pub/Sub messaging model

The Pub/Sub (Publish/Subscribe) messaging model is a way for different systems to communicate asynchronously. In this model, publishers send messages about specific topics without knowing who will receive them, while subscribers express interest in certain topics and receive relevant messages. Think of it like a newsletter system: publishers send articles on topics they choose, and subscribers receive only the articles on topics they've signed up for, without direct interaction. This setup allows for flexible, scalable communication, enabling multiple systems to exchange information efficiently without tight coupling.