What is the main role and necessity of using a message broker in a data exchange system?

A message broker is an intermediary that ensures reliable and asynchronous message exchange between system components.

Main roles and benefits:

• Component separation: allows services to communicate without direct dependency on each other.
• Asynchrony: the sender does not wait for an immediate response, which increases performance.
• Reliability: guarantees message delivery even if the receiver is temporarily unavailable.
• Scalability: simplifies adding new services and load balancing.

Example: In a order processing system, a message broker receives events about new orders and distributes them among different services (payment, delivery) without direct interaction between them.