Ads can be started or paused at any time. Please note it can sometimes take a few minutes for a campaign to be fully paused, as ads can be pre-loaded in some circumstances.
To pause or resume an ad, simply click on the pause/resume symbol .
This action can be done at any time, even when the ad is still pending.
When running, the ad will show in green when paused, it will show in red
In addition, if you hover over the button, you can see the current status of this ad.
If you have multiple ads, there will also be a Pause All and a Resume all option at the bottom of the ads list.