There is no dedicated dashboard for Google Shopping; it is simply an extension of your Google Adwords account. Your customers don't purchase your products from Google or a Google marketplace. They will discover them via a Google search and then be re-directed to your website or shopping cart.
Therefore, any orders received through Google Shopping will appear on your linked website or shopping cart. This integration requires that you have a Google Merchant Center account and a Google AdWords account with a Google Shopping campaign set up.
Click here to create a Google Merchant Center account
Click here to create a Google Adwords account
Click here to set up a Google Shopping campaign
Click here to integrate Google Shipping with your SellerActive Account