* 알겠습니다 (algesseumnida): This is the most formal way to say "okay" or "I understand." Use this with superiors, elders, or in formal situations.
* 알겠어요 (algesseoyo): This is a polite way to say "okay" or "I understand." Use this with people you don't know well or those you want to be polite to.
* 알아 (ara): This is an informal way to say "okay" or "I know." Use this with close friends and family.
* 응 (eung) or 어 (eo): These are very informal and often used as a simple acknowledgement, similar to a hum or "mm-hmm." Only use these with close friends and family.
* 좋아요 (joayo): This translates to "good" or "okay," implying agreement or approval. It's a polite and versatile option.
The best choice depends on your relationship with the person you're speaking to. For most situations where you need a polite and safe option, 알겠습니다 or 알겠어요 are good choices.