Wix Stores is a great way to start selling products on Wix, but the marketing tools are definitely lacking. In particular it’s currently impossible to export a feed and send your products to Google Merchant Center or Google Shopping in an automated fashion.
The only way to do this currently is entirely by hand in Excel or Google Docs, but Feedonomics allows you to dynamically create a Wix Store feed for Google Shopping without the need for anything manual.