Nowadays you can get the lyrics to a song before it even comes out. If you want to know the meaning behind the lyrics, sites like Genius.com might have audience interpretations as quickly as thirty minutes after the song's release. All that stuff comes easily nowadays, but back in the day there was only one way to find out the lyrics to a song: the leaflet accompanying the CD. I would read CD leaflets like a book, even if there was barely anything in it. When there was nothing but the cover art, that was a huge disappointment.
My favorite CD leaflet was the soundtrack to Dark Angel season two. I know that's super obscure, but the leaflet had pictures of Jessica Alba in it. What can I say? I love Jessica Alba.