Unavailable Songs

[evan_SR]

I'm new to Spotify. As I was looking for songs for my first playlist, I came across one I'd been searching for that was listed with gray instead of white text. When I added it to my playlist, it didn't show up, but if I try to add it again, it says the song is already on the playlist. I asked a friend what was going on and he said I needed to download the song, which was a Premium feature. So I activated the free 7-day trial of Premium and attempted to download and even save the song, but it still would'nt show up. I also noticed that when double-clicked, instead of playing, a blue banner shows up that says "This song is not available. If you have the file on your computer, you can import it." I have know idea what that means. What do I need to do to be able to listen to my song?