Progressive Rock, or Prog, is the genre that combines the complexity of classical music with the energy of rock, creating a sophisticated and ambitious sound. Emerging in the late 1960s and early 70s, it was popularized by bands like Yes, Genesis, and King Crimson, who brought a more intricate, conceptual approach to rock music. Prog's appeal lies in its innovative compositions and technical prowess, making it a favorite for musicians and fans of musical virtuosity. Today, it continues to thrive, with new bands and artists exploring its expansive, exploratory soundscapes.