You can stop or start a promoted listings campaign at any time. Stopping a campaign generally takes effect the same day. Keep in mind, however, that any sales generated after you stop the campaign from buyers who clicked your ads before you stopped the campaign are charged the promoted listing fee. Dashboard information from stopped campaigns continues to be available.
So basically, it works the same way as the "Markdown Manager." You determine which items you want to promote and for how long, however, you can stop promoting items any time you want by ending the campaign.
HTH
