Swing and blues are two influential genres in American music that emerged in the early 20th century. Swing music, characterized by its strong rhythm and lively tempo, developed in the 1930s and became popular in dance halls. It often features big bands and improvisation, with notable artists like Duke Ellington and Count Basie leading the way. Blues, on the other hand, originated in the African American communities of the Deep South, rooted in spirituals and work songs. It emphasizes emotional expression and storytelling, with artists like B.B. King and Muddy Waters shaping its sound. Both genres have significantly influenced jazz, rock, and pop music.