I always wondered what was the point in naming an album after the song or vice versa. Anyone know?

The proper adjective is "eponymous," and it is usually a promotional tool. It was a great marketing move prior to the Internet and iTunes.

I've always thought naming a song with the album's title was an artist's way of showing off the album's concept in one song.

because it's hard to download a song with the same name illegaly, so u have to download the whole album and listen to it