When to use to greet in Korean
Korean: 인사하다[ in-sa-ha-da ]

When to use it
To greet means to say hello or show polite friendliness when you meet someone. In Korean, 인사하다 is used when you meet people, leave them, or speak politely in everyday life. You can use it at home, at school, in stores, and when traveling.
Example sentences
아침에 엄마에게 인사해요.
I greet my mom in the morning.
학교에서 선생님께 인사했어요.
I greeted my teacher at school.
친구를 만나면 먼저 인사해요.
When I meet a friend, I greet them first.
가게에 들어가서 직원에게 인사했어요.
I went into the store and greeted the clerk.
옆집 할아버지께 웃으며 인사해요.
I greet the grandfather next door with a smile.
여행 중에 호텔 직원에게 인사했어요.
I greeted the hotel staff during my trip.