The "publish-subscribe" model is a messaging pattern used in computer systems where messages are sent from publishers to subscribers. In this model, publishers create messages and send them to a central system, while subscribers express interest in specific types of messages. This allows for a decoupled communication system, meaning publishers and subscribers do not need to know about each other directly. In a typical publish-subscribe system, when a publisher sends a message, the central system distributes it to all subscribers who have shown interest in that message type. This approach is commonly used in applications like news feeds, social media, and real-time notifications, enabling efficient and scalable communication.