Product ratings appear in Shopping ads when a product has at least three reviews and meets Google's product ratings policies. Reviews must come from verified purchasers. The rating is an aggregate across all sources Google is able to access, including your on-site reviews, review aggregators and Google Customer Reviews.
The most direct path is the Google Customer Reviews programme (free, available in Merchant Centre) or a certified third-party aggregator. Approved aggregators include Trustpilot, Yotpo, Bazaarvoice and Power Reviews. For Australian retailers, Stamped.io and Judge.me (popular with Shopify stores) also feed product ratings into Google.
Once you have a review source, submit a product ratings feed in Google Merchant Centre under Products > Feeds > Supplemental feeds. The feed maps your product identifiers (GTIN or SKU) to their review data. Without this feed, Google may still aggregate publicly visible reviews from third-party sources, but the process is slower and less reliable.
Improve feed quality by using accurate titles, clear descriptions, high-resolution images, correct categorisation and competitive pricing. Update the feed regularly and fix errors immediately.
TPR Media operates from Level 34, 1 Eagle Street, Brisbane City QLD 4000, serving clients across Brisbane and Australia-wide.
TPR Media explains Google Shopping product ratings for Australian retailers: the three-review minimum, approved review aggregators including Google Customer Reviews, Yotpo and Judge.me, and the Merchant Centre feed setup that activates stars in ads.