Based on Partner configuration the order can be sent to one of two places:
Submitting for Customer Approval
You will be prompted to choose a contact that the order will be sent to - Once this has been sent, it will be delivered to your selected contact. The delivery can be tracked in the Order Activity card.
You may resend the order to a new or the same contact by selecting "Resubmit for Customer Approval" button on the top left of the order.
Submitting for Admin Approval
When you are submitting for Admin approval the order will enter a "Pending" Status.
It is now up to an administrator with "Can Manage Orders" permissions to review it and either Approve or Decline the order.