I see quite a few bloggers having a separate twitter account for their blog. I’m confused.

What is it actually used for? To link your latest post, or just for random updates? Isn’t that what the blog is for-to share your thoughts?

To be honest, I don’t use twitter much. Once in two weeks would be my good performance. Also, I don’t really know what to tweet about. I hardly tweet in my personal account itself, how do you guys do it for the blog’s too?

Seeing a couple other blogs have twitter accounts, I thought maybe I could too. I could be regular and updated with it if I started to and wanted to. But then there’s the questions-what do I tweet about? Will anyone actually see it or will I be wasting time?

I don’t mean to be rude, I just want clarification. Answer my questions, someone?