Lost luggage refers to baggage that is misplaced or not delivered to its owner after a flight. This can occur due to various reasons, such as flight delays, missed connections, or incorrect handling by airline staff. When luggage is lost, travelers often report it to the airline's customer service for assistance in locating their belongings. Airlines typically have procedures in place to track lost luggage using a unique identifier, such as a baggage claim tag. Passengers may receive compensation for essential items while waiting for their luggage to be found. Most lost luggage is eventually returned within a few days.