What is a message broker used for?

A message broker is used to organize message exchange between different components of a system or services. It provides asynchronous communication, allowing the sender and receiver to operate independently.

Main tasks of a message broker:

• Buffer messages to increase reliability.
• Ensure message delivery even during temporary failures.
• Distribute load among consumers.
• Support various exchange models: queue, publish-subscribe.

Example of use: microservices architecture, where services exchange events through a broker (e.g., RabbitMQ, Kafka) for scalability and fault tolerance.