"그 (That)" is a Korean demonstrative pronoun used to refer to something that is not close to the speaker but is known to both the speaker and listener. It can indicate a specific object, person, or idea that has already been mentioned or is understood in the context of the conversation. For example, if someone is talking about a book they read, they might say, "그 책은 재미있어요," meaning "That book is interesting." In addition to its use as a pronoun, "그" can also function as an adjective to describe nouns. It helps to clarify which item or person is being discussed, especially when there are multiple options. For instance, if there are several students in a classroom, one might say, "그 학생은 잘생겼어요," meaning "That student is handsome." This usage helps to specify and provide context in communication.