You can set a Workflow to Live or Off
Live: The Automation is working the way it was set up, based on the triggers.
Off: The Automation still appears in your list but it is inactive and will not complete any actions.
Click Marketing > Automation
Click the edit pencil under Actions
From this screen you can edit, turn off, or set a set a Workflow live!
To set an Automation Live or Off: Toggle the Workflow, in the top right corner