Christian rock is a genre of music that combines elements of rock music with themes and messages centered around the Christian faith. It emerged in the late 1960s and has since evolved to include various styles, from soft rock to heavier forms like hard rock and metal. The lyrics often focus on worship, personal faith, and the teachings of Jesus Christ. Many Christian rock bands and artists aim to reach both believers and non-believers, using their music as a way to share their faith. Popular groups in this genre include Switchfoot, Casting Crowns, and Skillet, each bringing their unique sound while promoting positive messages.