Meta has introduced a new update where ads that haven't generated any results within the past 14 days will be automatically turned off. This change is part of their ongoing efforts to improve ad performance by prioritizing active campaigns that are producing results. If an ad is deactivated, a "Delivery error" status will appear in your Ads Manager. To reactivate the ad, advertisers will need to either modify the existing ad or create a new ad set with different parameters.
This update encourages advertisers to continuously optimize their campaigns, ensuring that only effective ads continue to run.