Poetry can say so much in a few words. But each word is important and must say more than the language we use every day. By writing poetry, I have learned how to read and understand poems by others in a deeper, more meaningful way. I advise my students who write prose, to read poetry and try to write poetry. Poetry is a way to put forth an idea or a story in a concise manner, to say something in a few words that leave a lasting impression.
The use of metaphor increases the reader's understanding and draws him deeper into the poem. I learned to use at least one metaphor in every poem I write.