The GTIN also is known as a global trade Item number is a global identifier for your product. Please always provide the GTIN when it is available. If you want to sell a product that does not have a GTIN, you will need to provide the information of the manufacturer and MPN (Manufacturer Part Number). Pay attention to the correct spelling of these codes. In addition, you can use the MID, our marketplace gives this as an article number. Our marketplace dictates the article number to provide product data for a product that already exists in our marketplace.