How did jazz spread across America?

Jazz spread across America primarily through the Great Migration, when African Americans moved from the rural South to urban centers in the North, bringing their musical traditions with them. The rise of radio, phonograph records, and live performances in venues such as speakeasies and dance halls also played a crucial role in popularizing jazz across diverse audiences. Additionally, the cultural exchanges during events like the Harlem Renaissance further propelled its influence, leading to the development of various jazz styles throughout the country.