Koreans use it to praise children, students, or colleagues after they do something well.
Yes. "잘했어요 (jalhaesseoyo)" is polite and warm. You can also say "잘했어 (jalhaesseo)" casually with friends.
You can say "You did very well" — 정말 잘했어요 (jeongmal jalhaesseoyo).
잘했어요 means "Good job" / "You did well." 잘 (jal) = well, 하다 (hada) = to do, 했어요 (haesseoyo) = did polite. Common praise for children, students, colleagues. Warm encouragement in Korean culture.
1. Praise children: After homework, exam.
2. Students/colleagues: After task well done.
3. Encouragement: Build confidence, motivation.
You did really well! Good effort!
Good job. Thank you. (Formal)
Good job! Amazing! (Casual)
Wow, good job! Keep it up!
• 수고했어요 (sugohaesseoyo) - Good work / You worked hard
• 대단해요 (daedanhaeyo) - Amazing!
• 칭찬해요 (chingchanhaeyo) - I praise you