Important Note: As a bonus feature, Sales & Orders will also import orders and order details directly from your BigCommerce store. Though these orders are not actionable within your account, you will still be able to view and track order statuses alongside Marketplace orders.
Note that order syncing is done automatically in the background every 10 minutes.
When logged into your BigCommerce store's control panel, use the main navigation on the left and click on Orders:
Orders processed by your Sales & Orders account will be listed here and will be indicated by a unique "imported" icon in the table versus orders that occurred directly on your site:
As you change the status of an order within your BigCommerce control panel, Sales & Orders will import the new status every 10 minutes and send it back out to Marketplaces like Google Shopping Actions: