The Korean word for greeting is InSa. With your legs together, and your arms straight at your sides, bend forward at your waist and do not maintain eye contact. Bows are traditional and common in Korea, although it is often accompanied by a handshake among men. To show respect when shaking hands, support your right forearm with your left hand.
Korean women usually nod slightly and will not shake hands with Western men. Western women may offer their hand to a Korean man.
Bow when departing. Younger people wave (move their arm from side to side).
Images source: Korea.net