Publish-subscribe.

also: pub-sub · pub/sub · pubsub · publish/subscribe

A messaging pattern where every message published to a topic is delivered to all of its subscribers.

the two-minute refresher

One event, many listeners: order.created reaches billing, email and analytics.
The publisher doesn't know who listens, so new subscribers need no producer change.
Contrast with a work queue, where each message goes to exactly one consumer.
Consumer groups combine both: fan-out across groups, load balancing within a group.

also: pub-sub · pub/sub · pubsub · publish/subscribe

A messaging pattern where every message published to a topic is delivered to all of its subscribers.

One event, many listeners: order.created reaches billing, email and analytics.
The publisher doesn't know who listens, so new subscribers need no producer change.
Contrast with a work queue, where each message goes to exactly one consumer.
Consumer groups combine both: fan-out across groups, load balancing within a group.