Google requires GTIN & Brand for each product in your product feed and will start enforcing that as of May 16th, 2016. That means that products without a GTIN will be disapproved. If you got away so far, by adding Brand and (a fake?) MPN, it is time to go after your GTINs.
Here are 7 questions about GTINs and the consequences for you:
This applies to all new, in-stock products that have GTINs assigned by the manufacturer, in the Google Shopping feeds for these countries.
Australia, Brazil, the Czech Republic, France, Germany, Italy, Japan, the Netherlands, Spain, Switzerland, the UK, or the US.
Google already started showing warnings in the Diagnostics tab of your Merchant Center in February. Mid-May, they will actually enforce the presence of a valid GTIN, which means that products without GTIN & Brand will not be advertised.
GTINs help them understand exactly what you're selling. When they understand what you're selling, they can help boost your ad performance by adding valuable details about the product and serving the ad in a more relevant way to users.
This also means that your ads can serve in more places on Google, YouTube, and their partner sites. Merchants who've added correct GTINs to their product data have seen conversion rates increase up to 20%.
GTIN stands for Global Trade Item Number. It is a unique identifier for each product. It is better known as the Barcode. You may not have heard of GTIN, but it comes in many flavors that you probably do know, like UPC, EAN, JAN, ISBN or ITF-14.
There are 2 possibilities:
We will change the Google Shopping templates for those 12 countries after May 16th, so that GTIN and Brand become required fields. In the meantime: check your Google Merchant Center to see for which products you need to add a GTIN.