To publish a banner, press the eye icon on the banner itself.
Once your banner has gone live on a media outlet and for some reason you want to pull it from the air, simply unpublish it by pressing the strike-through eye-icon. Note that this action will remove the banner from the web causing the media outlet to display a blank screen instead of the ad. This should therefore preferably only be used when the banner is not being actively displayed or when the media outlet has failed to respond.
If you unpublish a banner, then publish it again, you will not need to send anything to the media outlet. Your banner should appear live automatically, as long as it’s published.
Republishing is a way to publish any edited changes to your banner without having to unpublishing it first.