Shopify makes use of variant_id for products, that's a novel identifier for every version of a product (including unique dimensions or colours). You can find the variant ID by checking your Shopify product information or utilizing a Shopify application that exports product information. Istotne są przede wszystkim ustawienia lokalizacji - https://googlemerchantid31119.blogars.com/31572231/detailed-notes-on-automatic-google-merchant-center-google-shopping