Pub/Sub (publish/subscribe) is a messaging pattern where senders of messages, called publishers, do not program the messages to be sent directly to specific receivers, called subscribers.
Instead, published messages are published to topic channels, without knowledge of what, if any, subscribers there may be. Similarly, subscribers express interest in one or more topic channels, and only receive messages that are of interest, without knowledge of what, if any, publishers there are.
This pattern provides greater network scalability and a more dynamic network topology.
Since Realtime Cloud Messaging is supported by an elastic multi-cloud infrastructure you don’t need to worry about scalability and availability, we’ll handle it for you so you can focus just on developing great real-time applications.