Du is a German word that means "you" in English. It is used in informal contexts, typically among friends, family, or people of the same age group. In contrast to the formal "Sie," which is used to show respect or distance, "Du" creates a sense of familiarity and closeness. In many cultures, the use of "Du" can signify a more relaxed relationship. In German language learning, understanding when to use "Du" versus "Sie" is essential for effective communication. This distinction reflects social norms and can influence how individuals perceive each other in various settings.