The Settings page on Workflow allows you to edit the Name and Description of the Workflow, along with the Priority should you want this to run before or after another Workflow.
This is also where you Enable a Workflow to start it running when the rules are matched, or Disable a Workflow to prevent it from running whilst you work on it or until you are ready.
You can also Archive a Workflow entirely from the Settings page which will remove the Worfklow from your organisation