Sonny Boy Williamson was a seminal American blues harmonica player, singer, and songwriter. He is known for his work during the 1950s and 1960s, and his style was deeply rooted in Delta blues, characterized by his gritty, expressive harmonica playing and soulful vocals. Key tracks such as "Help Me" and "Eyesight to the Blind" showcase his signature sound. His influence is significant, with his works covered by renowned bands like The Who and The Yardbirds, underscoring his enduring impact on the blues and rock genres.