I tracked a shipment, but it says 'shipment information has been sent to FedEx'. What does that mean?

The following scenarios are possible when you receive notice that shipment information has been sent to FedEx.

What does "shipment information has been sent to FedEx" mean?
It means that the shipper has used the FedEx Ship Manager online shipping tool and has completed creating the air waybill.

Does shipment Information has been sent to FedEx mean that FedEx has received the package?
No, it does not mean that FedEx has received the shipment. When we have received your shipment, you will see "Picked Up."

After receiving the notice that the shipment information has been sent to FedEx, no information has been updated for a few days. What should I do?
It is possible that the shipper created an air waybill using the FedEx Ship Manager online shipping tool, but for some reason did not ship the package. Please contact the shipper to confirm.