What is the exact difference between poetry and song lyrics?
The main difference, of course, lies in the fact that poetry is presented to and received by the eyes, while song lyrics–the ears. A key aspect of poetry is the format and how the piece is broken up into stanzas and even further broken up into lines. However, in songs, it is more about how the lyrics are received by the ears. You can’t hear those enjambed lines and line breaks.
So even though the complex content may be the same in both poetry and song lyrics, the difference lie in the following: