An Approval Mapping indicates the approvals required when moving in a workflow step, in order to allow transitioning in a next one.
The Approvals Mapping Administration screen allows you configuring an overall approval mapping for the selected Project/Issue type/Workflow transition.
An overall approval mapping can be override by an approval mapping configuration defined for a single issue.
By default, there are no overall Approval Mappings or Single Issue Approval mappings configurations when you first install the add-on.
The following pages describe how to manage the two type of settings.