The document discusses the history of rock music from the 1950s to present day. It outlines the emergence and evolution of various rock genres over the decades, highlighting influential bands that defined each era, including Elvis Presley and The Beatles in the 1950s-60s, Led Zeppelin and Queen in the 1970s, Guns N' Roses and Bon Jovi in the 1980s, Nirvana and Pearl Jam in the 1990s grunge movement, and modern popular genres like alternative rock, emo, heavy metal, and pop acts. The history provides context for the types of rock bands that could be featured in a magazine targeting today's 15-30 year old audience.