Etiquette is extremely important in South Korea, and it is based on the core values of Korean Confucianism. Most customs apply to the whole country, but there are also local variations and foreign influences. It is customary to greet by bowing, but sometimes a handshake is included. Korean women might nod slightly when seeing a foreigner. The Korean women do not shake hands with Western men, but it is acceptable for Western women to shake hands with a Korean man.
At Korean restaurants, be aware that there is usually a button on the corner of your table that will call the server if you need anything at all. When eating with Koreans at Korean restaurants, there are a few key things to remember. Always try to pour drinks of elders before pouring your own. Drink your soup before eating any of your other dishes. Do not leave your chopsticks sticking out of your rice dish. Last, do not leave any food on your spoon when you are eating. Remember these, and your Korean host will be highly pleased at your respect of their customs.