Whitman used iambic feet in the poem for what purpose

Sometimes when you read things in your head, you skip overall small details/words. when you read aloud, you hear those words and it’s easier to comprehend what you just read. saying things aloud also you remember them.

Hi there,this is a weird question, but any how here is the answer: i am from australia, and the quality of life is pretty good.  hope this : )