Friends, I have seen many people though they are a kind of webmasters, prefer to create blogs using blogger.com or wordpress.com, rather than creating websites, though now a days to create website is easy with free website builder, and even host it for free with any free web hosting provider.

So I wonder why many people are creating blogs? Why not free websites when it's very easy?
Is there any advantage in blogs over websites? I mean is there any special thing in blogs?