There's massive confusion in the market about ratings in Shopping ads.
Most advertisers don't understand that there are actually two completely different types of ratings that serve different purposes.
These are what most people think of - those stars that appear directly in Shopping ads.
Product ratings are:
Most advertisers already have these implemented, but they're just one piece of the puzzle.
Store Ratings are totally different from Product Ratings.
They're part of your overall Store Quality score in Google Merchant Center and appear across multiple platforms: