Where can I enter a GTIN, EAN or MPN for my product?
Unique product identifiers are individual codes given to products. They are split into two types, either the GTIN (Global Trade Item Number) or MPN (Manufacturer Part Number). EAN is a type of GTIN that's in use in Europe.
If you submit your products to Google Shopping (or similar aggregators) then you'll need to have entered a GTIN or MPN for your product (unless you've got an exemption).
You won't be able to enter GTIN or MPN codes for your products unless you have installed the Google Feed APP.
When adding/editing a product, the GTIN and MPN can be entered in the 'additional information' section of the page.
Click the box to open the section and then you'll see the GTIN and MPN fields
Enter your values into these boxes and save your changes.