The main impact of the Great Migration of African Americans in the early 20th century was the transformation of urban demographics and culture in the United States. This mass movement from the rural South to urban centers in the North and West, particularly during the 1910s to 1970s, resulted in significant cultural contributions, notably in music, art, and literature. It also led to greater employment opportunities and the establishment of influential communities. However, migration also brought about challenges, such as racial discrimination and housing segregation, which intensified social tensions in the newly settled urban environments.