Progressive rock, often abbreviated as "prog rock," is a genre of music that emerged in the late 1960s and gained popularity in the 1970s. It is characterized by its complex compositions, intricate musical structures, and a blend of various musical styles, including rock, jazz, and classical. Bands like Pink Floyd, Yes, and Genesis are notable examples, often incorporating elaborate lyrics and concept albums that tell a story. The genre typically features extended instrumental sections, unusual time signatures, and a focus on artistic expression rather than commercial appeal. Progressive rock often emphasizes the use of synthesizers and other electronic instruments, pushing the boundaries of traditional rock music. This innovative approach has influenced many artists across different genres.