What is the purpose of writing a rap poem?

Read the following

Explanation:

There are many ways to express writing. A rap poem is one way to do so. This connects and ties words together that usually rhyme and repeat a rhythm. This allows the readers to connect and easily follow the story the writer is trying to provoke.

So it sounds better.

Explanation:

A rap poem means you are telling a story and trying to make each line/verse rhyme, its designed to go faster than usual and rhyme so it sounds good.