An error occurred while saving the commentThe Newest Factor, LLC commented
Use the plugin "WooCommerce Google Product Feed". Then it will automatically add the feeds fields for you but you will need to go to your feed setting which is the "WooCommerce" Setting where you can click on the Product Feeds tab to activate the GTIN field! That's it! You're good to go!
When you get ready to setup your Google Merchant feed, make sure you use the Fetch method. The plugin have a real detailed, easy, simple to follow instruction on how to set it up. Takes less than 15 min. If you need additional help, email me!