Rock is a popular music genre that originated in the 1950s. It is characterized by a strong beat, simple chord progressions, and often revolves around the electric guitar, bass guitar, and drums. Rock music has evolved over the decades, giving rise to a variety of subgenres including classic rock, punk rock, hard rock, and alternative rock. It is known for its energetic performances, rebellious lyrics, and cultural impact, influencing fashion, attitudes, and lifestyles. Rock music has been a tool for social and political expression, often addressing themes of love, freedom, and societal issues. Iconic rock artists include The Beatles, Led Zeppelin, and Queen.