"누가" is a Korean word that translates to "who" in English. It is commonly used in questions to inquire about the identity of a person. For example, one might ask, "누가 그 일을 했어요?" which means "Who did that work?" This word is essential in everyday conversations and helps in gathering information about people. In Korean grammar, "누가" can also function as a subject in a sentence. It is often used in various contexts, such as in storytelling or when discussing events. Understanding how to use "누가" effectively can enhance communication skills in the Korean language.