R&B, short for Rhythm and Blues, is a genre of popular music that originated in African American communities in the 1940s. It combines elements of jazz, gospel, and blues, characterized by soulful vocals, strong backbeats, and a focus on themes of love and relationships. Over the decades, R&B has evolved and influenced various other music styles, including rock and roll, soul, and hip-hop. Modern R&B often incorporates electronic instruments and production techniques, maintaining its emphasis on rhythm and emotional expression.