Can you explain the working principle of the Push model in message broker systems?

In the Push model in message broker systems, the broker actively sends ("pushes") messages to subscribers immediately after they appear. Subscribers do not request messages themselves but receive them automatically.

This means that the broker controls the delivery timing and can immediately pass the data, reducing delays and simplifying real-time processing.

Example: if you have a subscriber to a news channel, the broker will immediately send a new message as soon as it appears, without the subscriber needing to poll the broker.

The main advantage is prompt delivery. The disadvantage is that the subscriber must be ready to receive messages at any moment, otherwise it may lose data if it does not process it in time.