In April 2018, Google started implementing ad suggestions. Basically, these are ads that Google generates and “suggests” that you use.
The ads are developed using machine learning. They pull from prior campaigns for content, including ad headlines, descriptions, extensions and landing pages
Advertisers can review, edit and/or dismiss the ad suggestions. But if they don’t act within 14 days, the ads will be applied to their accounts automatically.
So if you’re not paying attention, you may find that ads you’ve never seen before are now live in your account!