Missing GTIN and identifier gaps
Many Shopify catalogs do not store GTIN, MPN, or brand values consistently across every product and variant.
Merchant data
Missing GTIN and identifier gaps
Many Shopify catalogs do not store GTIN, MPN, or brand values consistently across every product and variant.
Google Merchant Center often flags Shopify feeds when a product has no GTIN and also lacks a complete brand plus MPN fallback. This is especially common when products are imported from suppliers or when only the parent product has identifier data while variants do not.