* 좋아요 (joayo): This is a common and versatile way to say "OK," "good," or "all right." It's polite and suitable for most situations.
* 알겠습니다 (algesseumnida): This translates to "I understand" or "I got it," and is a more formal way of acknowledging something. Use this when speaking to superiors or elders.
* 네 (ne): This is a simple "yes" and can be used informally as an equivalent to "OK" or "alright."
* 응 (eung): This is a very informal "yes" or "OK," only appropriate for close friends and family.
So, the best choice depends on the situation. For most everyday situations, 좋아요 (joayo) is a safe and versatile option.