If you're lucky, when running an ad on Facebook it will generate comments and likes. However, when the ad ends you lose those comments and likes. Is there a way to keep them when you run the ad again? Specifically, can this be done with Facebook Product Catalog Ads? (example shown below)
Yes, you can run dynamic product ads to people who've engaged with your previous ads. You'll need to run your catalog ads to Facebook page engagement audience (custom audience).
Here's more information about it: https://www.facebook.com/business/help/221146184973131?helpref=faq_content
If you have any other ad related or selling related question, please email me on firstname.lastname@example.org. or you can ask that question in Seller Success Facebook group as well.
Good luck :)