The Orders grid lists all current orders and tracks their progress and order status through the workflow. An easy way to understand the basic process is that an order becomes an invoice, and an invoice becomes a shipment. The grid represents the first stage of the process, and is where you can update existing orders and create new orders.
Orders are usually created when customers complete the checkout process from the storefront. However, if a customer needs assistance, you can also access their shopping cart or create an order either from the Orders grid or directly from their customer account.
For help with troubleshooting order issues, see the following Commerce Support articles: