Informal address refers to the casual way people communicate with each other, often using first names or nicknames instead of formal titles. This style of communication is common among friends, family, and peers, creating a relaxed atmosphere. Informal address can also include slang or colloquial expressions, making conversations feel more personal and friendly. In many cultures, the use of informal address signifies familiarity and comfort. For example, in English, people might say "Hey, John!" instead of "Hello, Mr. Smith." This approach helps to break down social barriers and fosters a sense of community among individuals.