Judge.me provides the separate unique review feed and that is added into Google Merchant Center in addition to our main GMCFeed product feed.
(It takes the GTIN/SKU information and merges the reviews to the SKU within Google)
First Step:
You will need to register with Google for access to Product Reviews.
https://support.google.com/merchants/contact/product_ratings_interest_form/
Final Step:
Then once you are approved this is the next steps in Judge.me to connect your feed:
https://judgeme.freshdesk.com/support/solutions/articles/44001260310-how-to-upload-product-reviews-xml-feed-trouble-shooting-