This is when the order has been checked out and payment is pending or not complete, if it stays pending and is not due to payment processing time more than likely the order will stay pending/incomplete. This can be due to refresh during check out, navigating away from check out page or interrupting payment process.
This can show if the payment method or issuing card provider has a pending time frame, the order has been process but the transfer of fund can take a specified amount of time, until the fund have been received the order will not be fulfilled
The order has been processed and paid for and is awaiting to be packed and shipped, if the order is a made to order item or custom then it will also include the required manufacture time for the item to be made before being able to be packed and shipped
Order has been fulfilled and is waiting to be shipped. If order is completed on a weekend or outside of postage sending times and is ready to be sent or needs a tracking number on being shipped
The order has been processed, manufactured, packed and sent to Postal Service. If the shipping option has any tracking updates they will be available via the tracking id on the post site for the selected option. The shipped status update will not change with the tracking id updates or on delivery.