With YITH Google Product Feed for WooCommerce you can create the product feeds required by Google to show your products in the Shopping showcase. You can generate the product feeds you need in few clicks and choose which attribute fields and products to include.
The integration allows you to export all associated brands to each product in the xml file information. This way you will not need to manually set the brand in the Google Product Feed fields.
Link the brand(s) you want to the product(s) you want and save them. Go to Google Product Feed > Manage Feeds > Feed XML > Download.
The brand(s) you have added will appear in the list, as shown in the example below.
For more information on how to set up the Google Product Feed plugin, check the complete documentation here.