Description: The ‘Publish-Subscribe’ (Pub/Sub) messaging pattern is a communication model that allows senders, known as publishers, to send messages without needing to know the identity of the recipients, called subscribers. This approach promotes a decoupled architecture, where publishers and subscribers operate independently. Publishers send messages to a specific channel or topic, and subscribers register to receive messages from those channels. This separation of roles facilitates scalability and flexibility in system design, allowing multiple subscribers to receive the same message simultaneously. Additionally, the Pub/Sub model is highly efficient, enabling real-time data transmission and large-scale information distribution. It is widely used in modern applications such as messaging services, notification systems, and event-driven architectures, where asynchronous communication and rapid responsiveness are essential.