...Its build with awesome tool – Google App Script. All your changes done in Google Spreadsheet table, and from there you can update web store products.
Basically it needs two extensions installed. One is for Google Sheet (App script addon), another for Woocommerce. App script addon update spreadsheet functionality and send-fetch data from-to web store, directly through Woocommerce REST API. Woocommerce extension its some kind of optimization for search, update products, create products, get email content etc.