The Complete Orders function allows you to complete multiple orders at once rather than click on each order to complete.
Please note that only orders with the order status Submitted can be completed through this function.
Complete Multiple Orders
FOLLOW THE STEPS TO COMPLETE MULTIPLE ORDERS:
1. In the Admin Panel, navigate to Store > Orders.
2. Use the left-hand search parameters to find the order(s) you wish to work with. To complete orders, you will need to search for only Submitted orders.
3. Check one or more boxes in the order listing for the Actions drop-down menu to appear.
4. Select Complete Orders.

5. In the Complete Orders window, choose if you'd like to Capture Payment, Email Order Confirmations, and select a Shipping Status. Shipping Status options include Mark Order As Shipped, Mark Order As Picked Up, and Don't Mark Order Shipping Status.

6. Click Apply Changes to complete orders.
Orders placed on the admin panel will send a confirmation email to the customer. However, the email will not be sent to the admin receiving order confirmation emails from website orders.