A more thorough explanation:

An air waybill is a document used in the transportation of goods by air. It is similar to a waybill used in maritime law, which acknowledges the receipt of goods by a carrier or shipper's agent and serves as a contract for transportation.

Unlike a bill of lading, an air waybill is not a document of title and is non-negotiable. This means that it cannot be used as proof of ownership or transferred to another party.

For example, if a company wants to ship a package by air, they will use an air waybill to document the shipment. The air waybill will include information such as the sender's and recipient's addresses, the weight and dimensions of the package, and the cost of shipping.

Another example is if a company needs to transport goods internationally by air, they will use an air waybill to ensure that the goods are properly documented and tracked throughout the transportation process.