An American rock band is a musical group that primarily plays rock music, a genre characterized by a strong beat, simple melodies, and often revolves around electric guitars, bass, and drums. These bands can vary in style, from classic rock to alternative rock, and often perform live at concerts and festivals. Many American rock bands have gained significant popularity and influence, contributing to the music scene since the 1950s. Notable examples include The Beatles, The Rolling Stones, and Nirvana, each leaving a lasting impact on the genre and inspiring countless musicians worldwide.