Missing GTINs quietly limit Shopping visibility.
Google uses GTINs to match your products to known items, reviews, and competing offers. If a barcode should exist but Shopify does not provide it, reach can drop without a dramatic warning.
Shopify field
Barcode
That field is where Google gets UPC, EAN, ISBN, or GTIN values for product variants.
Find the barcode
Use the UPC, EAN, or ISBN printed on the product packaging.
Add it to Shopify
Open the variant and fill the Barcode (ISBN, UPC, GTIN) field.
Handle exceptions
Custom, handmade, vintage, or one-off products may need a GTIN exemption.
The hard part is scale, not definition.
One missing barcode is easy to fix. Finding every affected variant across hundreds of products is where stores lose time. Catawise scans the catalog and separates true barcode issues from products that may need manual review before you decide whether a GTIN or exemption applies.
Find missing GTIN risks before they spread.
Free scan · 25 products · no credit card · no automatic changes
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