Google Shopping Review Feed Setup

I need a specialist who can take the reviews already collected through the review app on my Shopify store and turn them into a fully-compliant Product Ratings feed for Google Merchant Center. The job covers everything from exporting or accessing the data inside the app, mapping it to Google’s required XML (or Google Sheets) format, and submitting the feed so Merchant Center accepts it without errors. Once the feed is live I expect the review stars to appear beside my products in Shopping ads and free listings. Please make sure you are familiar with Google’s Product Ratings Feed specification, GTIN/SKU matching, and the usual quirks that come up when connecting Shopify review apps to Merchant Center. If the review app needs an API key or one-off export, I will provide access—what I need from you is the technical setup, troubleshooting, and confirmation that the stars show in the Shopping tab. Deliverables: • Valid, approved Product Ratings feed linked to my existing Google Merchant Center account • Clear hand-off notes explaining how the feed updates (schedule or manual) and how I can add new reviews in the future • Brief confirmation—screenshots or a short video—that stars are displaying in live Shopping results once Google propagates the data If you have done this before with Shopify review apps, let me know; speed and accuracy matter here.