The term "baggage fees" refers to additional charges imposed by airlines for transporting luggage or bags in addition to a passenger's carry-on items. These fees are typically assessed based on factors such as the weight, size and number of bags being checked, with heavier or oversized baggage often incurring higher charges. The purpose of these fees is to offset the costs associated with handling, transporting and processing luggage, as well as to encourage passengers to travel light and avoid additional expenses.