Checked baggage refers to the luggage that passengers hand over to the airline before boarding a flight. This type of baggage is stored in the aircraft's cargo hold during the journey. Travelers typically check in their bags at the airport counter or self-service kiosks, and they receive a baggage tag that helps identify their luggage upon arrival. When the flight lands, passengers can collect their checked baggage at the baggage claim area. It's important to note that airlines often have weight and size limits for checked bags, and additional fees may apply for excess baggage. Always check your airline's policies to avoid surprises!