With a standardized event mechanism, you can provision the event catalog for all business objects across the SAP S/4HANA application, to enable applications, partners, and customers to consume events related to all SAP S/4HANA business objects.
With event activation management, you can propagate only subscribed events to the messaging infrastructure and to those subscribers/receivers.
Side-by-side extensions provide a powerful way of extending SAP S/4HANA applications on SAP Cloud Platform for customers and partners without impacting the digital core, by building decoupled extension applications running side-by-side with SAP S/4HANA.