The global settings define parameters valid for all workflows. To specify them click Global settings.
It is mandatory is to define the Cumulus Server and the user account to be employed for the connection.
Since RoboFlow is a back-end-server-process, it is best to configure the email parameters. So you can be notified in case of a problem. Some workflows might require it, too. RoboFlow does not use the Cumulus email-engine because it needs to be able to notify when Cumulus is down or unreachable.
If your Cumulus installation uses Roles, you should specify the default Cumulus Permissions Template.