Complete checklist for sending optimized Shopify product data to Google Merchant Center in 2026 — without breaking historic sales data tied to existing product IDs. Watch the tutorial in the hero video.

Before you begin

You will lose historical click and sales data by changing product IDs. If you have historic sales data, don’t change product IDs. See the full YouTube guide to learn how to re-create existing product_ID formats.

  • Make a note of an existing Google Merchant Center account’s product_ID format
  • If your GMC product_ID is another code (like PN2019), identify where it comes from: MPN, Barcode, or SKU
  • Save a copy of the existing feed before sending a new feed

Oftentimes the product_ID in GMC is shopify_US + product id + variant id. If you created your store in 2026, it’s likely shopify_ZZ, not shopify_US.