What was the poem Harlem about?

Well, basically the poem was about how the author asked what happened when a dream is interrupted, or 'deferred'. the author keeps saying, "does it ... "

one question - did you read the poem yet?

This poem is one of Hughes's most famous works, it is likely the most common Langston Hughes poem taught in American schools. Hughes wrote "Harlem" in 1951, and it addresses one of his most common themes - the limitations of the American Dream for African Americans.