I have heard first time about micro site blog .Sorry , i have no idea.

I think he means micro blogging site. Can you ask your question clear? I didn't mean it.

Microsites are great for those who love doing twice the work.To building a microsite, target a particular keyword, and then using that site's strength to link to your primary site is a worthwhile strategy.

You mean you are sending the visitors from your blog to a microsite?