When a customer checks out from your store, an order is placed on the backend of your store. You can access orders from the left navigation panel WooCommerce > Orders.
Depending on the stage it is at, each order will have a status assigned to it. And you can take the required follow up action for each on this page such as sending emails.
On this page, you can filter orders based on date or customer.

Let’s get a quick overview on the different order statuses available under WooCommerce orders.
Pending Payment – This is when you have received an order, but it is still not paid. For example, if the customer has chosen PayPal payment gateway, they will be redirected to PayPal site during checkout. When the redirect happens, order is already placed on your store,