A new event step lets the sfde admin dynamically define a custom event to be triggered by the pipeline.
The custom event step allows you to register and create events based on a simple condition – query on the step payload.
If this condition is met, the custom event is generated and the payload of the step is used as event payload.
The pipeline step calls the condition checker. The condition checker sends a custom event to the event service, which executes the actions.

For details, refer to Configuring a pipeline.
