Can I pause my ad campaign and then start it up again at a later date?

When you purchase an ad, the ad is served only for that specific 30-day period and cannot be paused. If you wish to stop a specific ad from running for a few days, you can upload an alternate ad with a different destination link in its place. When you are ready for the original ad to run again, you can upload the original ad again and it will run for the remainder of the 30-day cycle.