This activity is to define default delivery branch for the service organization. Default Delivery branch is the default branch in the organization who handle the delivery of execution of the work task. The Default Delivery branch set as the Maint Org Site during the automatic creation of Work Task.
When you create a new service organization, the first branch that you add to the service organization will be set as Default Delivery Branch.
If you want to change, select the branch that you want to set as default delivery branch and click 'Set Default Delivery Branch'.
As a result of this activity, Default Delivery Branch will be defined for the Service Organization.