We recently upgraded to Magento 2.3.3 and wanted to try the functionality of the Google Shopping Ads module built into the program under Marketing. The initial upload takes a while, but when complete, I tried to make a campaign and the ownership of my Google Merchant account was revoked. As a result, I can't create any ads. Has anyone seen this issue before / know what tables in the database the plugin uses so I can reset them all?
You can unlink your account and reset. You can follow below magento document.
I hope it will help you!
If you are looking for the clear setup of Google Merchant and Google Ads + automation of your ads/products, surely visit this plugin - https://www.bluewinston.com/create-ads-for-products-in-Magento-with-just-one-click/
I was having the same problem--- Thank for the responses
Anyway visit the link if you are looking for Google Ad Management