Tutorial.html Show, Don't Tell. For me, songwriting is a form of creative writing.
Simple narration is certainly a legitimate way to communicate, and it's used in lots of songs.
But applying the tools of creative writing can make a song far more compelling, because it allows for freer interpretation on the part of the listener. Tools like metaphor and personification, symbolism and imagery require the listener to make mental connections and to draw from their own experience. I believe songwriting is largely a preconscious activity. But if you have an understanding of the tools of poetry, those tools are more likely to bubble to the surface when you need them. Pick one and go.