Some platforms give you the possibility to refresh your ads. Refreshing an ad means you are pausing an existing ad, cloning it and relaunching it. Why would you want to do that? Channels like Facebook will treat newly created ads differently from long-running ads.
Although it might seem like you are trying to beat Facebook’s auction algorithm, there is some benefit on refreshing ads, for example, if you are updating it’s creative.
Even Facebook encourage you to do that with a “Duplicate” button right next to your ads, claiming that ads running longer than a week will tend to decline in performance.