Feedburner - What the hell is this?

What the hell is feedburner? and why do we need to use it? What's the benefit of using feedburner. I think it is used to publicize one's blog and to send alerts to subscribers informing them of new posts. But what if you do not have any subscribers? How is it going to help in that case? This feedburner thing is stupid and nonsense. I am sure it is helping many bloggers who already have a alot of readers and who produce quality content. I don't have a lot of readers and I do not write quality content so FEEDBURNER is not going to help me.