The term "draft" refers to an email campaign that has been created, and perhaps tested, but has not yet been sent to contacts or a subset of contacts. The draft campaign will be saved in your account until it is sent, scheduled or deleted.
Click on 'Campaigns' to enter the dashboard. A full list of emails and status will be listed, look for the Draft status. Or, use the 'View campaigns that are' filter to choose Draft status only.