Intro
The Publisher–Subscriber (pub/sub) pattern is a messaging model in which publishers send messages to topics through a message broker, and subscribers receive messages from topics they subscribe to, enabling loosely coupled, asynchronous many-to-many communication.
The Pub/Sub (Publisher/Subscriber) model is a messaging pattern used in software architecture which uses a message broker. The message broker routes messages from publishers to subscribers based on subscriptions, ensuring correct delivery, persistence, and scalability.