When did jazz become an important form of music in the US?

Jazz became an important form of music in the United States during the early 20th century, particularly in the 1920s. This period, often referred to as the "Jazz Age," saw jazz flourish in cities like New Orleans, Chicago, and New York. The genre's unique blend of African rhythms, blues, and improvisation resonated with a diverse audience, establishing it as a key cultural force in American music. By the end of the 1930s, jazz had solidified its status as a major influence in popular music and American culture.