What term describes the fads and fashions that dominate mainstream media music and art for a period of time?

The term that describes the fads and fashions dominating mainstream media, music, and art for a period of time is "pop culture." This encompasses trends that are widely accepted and consumed by the general public, often characterized by their ephemeral nature. Pop culture is influenced by various factors, including societal changes, technological advancements, and the popularity of certain artists or styles.