How is a fad different from an avant garde style?

A fad is a temporary trend that gains rapid popularity but quickly fades away, often driven by social influence or novelty rather than lasting appeal. In contrast, avant-garde style represents innovative and experimental approaches that challenge conventional norms and can have a lasting impact on culture and art. While fads are often superficial and short-lived, avant-garde movements seek to provoke thought and inspire change over a longer period.