Pub/Sub
Pub/Sub (Publish/Subscribe) is a messaging pattern where senders (publishers) distribute messages to receivers (subscribers) without specifying individual recipients. It decouples components by allowing publishers to send messages to topics or channels, and subscribers to receive only the messages they are interested in based on subscriptions. This pattern is widely used in distributed systems, event-driven architectures, and real-time applications for scalable and asynchronous communication.
Developers should learn Pub/Sub when building systems that require loose coupling, scalability, and real-time event handling, such as microservices architectures, IoT applications, or data streaming platforms. It is particularly useful for scenarios where multiple components need to react to events independently, like notifications, logging, or data processing pipelines, as it reduces dependencies and improves fault tolerance.