Reading the explanation (and tested it), it does not matter how you name it, but maybe call it something like WorkflowAdmin_<nameoftheworkflow>
The page is used when you go to Workflow management in your application, then open the workflow and open an individual instance.
If you generate a page, it will use the template 'Workflow_Admin' to generate a page. If you don't specify a page, it will show the 'DefaultWorkflowAdmin' page.
Using different pages it allows you to specify more custom details per workflow.
Hope this helps.