Describe the usage of custom events

[Skyleiger]

I have been looking for a way to submit events to all my microservices to have a loose coupling between services.

This could be, for example, a customer create event that gets sent around so that I don't have to know which microservices the event goes to yet in order to program the customer service. It can simply be intercepted by all services.

Well, for that I came across Spring Cloud Bus.

Unfortunately, however, it is nowhere explained in detail how to create the Custom Remote Events now.

What is the origin? What is the destination?
Why do the events need to be scanned in advance?

Is Spring Cloud Bus suitable for my scenario or should it be done differently?

I ask for answers to my questions.