This is something I've been having a LOT of trouble with , but when I try to search for information on it I can't find what I'm looking for. I'm trying to make what I have sound less....empty. The first thing that pops out at me would be to add some bass, but I just can't figure it out. The sound isn't the problem, more so the application. When I try to add bass, it just doesn't sound right. Since "How do I bass?" seems too broad, I'll ask some more specific questions in no particular order.
What does bass do for a song?
Are there certain guidelines, mechanics, or intricacies to know about it?
Is it just one of those things I just have to play with?
Is it even necessary?
How else could I flesh out a song?
Any and all advice would be appreciated.