9.38.4.1 GCP PubSub Agents Overview

The GCP PubSub stands for Publisher/Subscriber. The Publisher sends while the Subscriber receives events (messages) of the subscribed topics. Each subscription can represent a group of single or multiple users as illustrated below:

Messages published before a subscription was created for a topic will not be delivered for that subscription. Each messages are typically delivered once and in the order as it is published based on the configuration.