Leg is a logistics term that refers to a segment of transportation in a single shipment. In logistics, when goods are transported, they are typically transported in multiple legs from the origin to the destination. For example, if goods are transported from Korea to the United States, they may be transported in multiple legs such as from Korea to Japan, and then from Japan to the United States. Each leg may have a different mode of transportation, transportation schedule, and transportation cost.
Source : ChatGPT