Jazz band leaders are musicians who guide and direct a group of jazz performers. They are responsible for selecting the music, arranging the pieces, and ensuring that the band plays cohesively. Often, they play an instrument themselves, such as the trumpet or saxophone, and may also take on the role of a vocalist. In addition to musical skills, jazz band leaders must possess strong communication and leadership abilities. They often engage with the audience during performances and may introduce songs or share stories about the music. Notable jazz band leaders include Duke Ellington and Count Basie, who significantly influenced the genre.