When you submit a new order, the order record goes into "in review".
A notification email with the order PDF gets sent to:
you (the buyer)
your sales rep
Your sales rep must review the order. If the order is accepted, they will move it into "approved".
From there, the brand will process your order. Some brands do this manually and enter them into the back-of-house system, while others have their orders automatically imported. When the order is in "processed", that usually means it's been received and entered in the back-office system.