Setup RSS Approval Escalation Workflow

We are researching the Approval Escalation Workflow capability to determine how we can meet requirements from the Procurement Team.

I have reviewed the Implementation Guide and several knowledge documents, but am no clearer on what the workflow can do.  The setup steps are quire specific but don't really provide detail on the fucntionality.

For example, the instruction for CC and the BCC is to set them to None.  Is there a reason why they are None, or is this just a simple escalation.

Has anyone configured and implemented RSS approval escalation workflow and able to share setup and findings

thanks