My exprience with Blog comment

Blog comment has two type .

1. Html Blog Comment
2. Normal Blog Comment

Html Blog Comment :  These type of blog comment where you put hyperlink on blog post .
Normal Blog Comment : These type of blog comment where you put name as a keyword and put home page URL in website .

But do not forget that put theme based comment on theme based blog .If you have business of real estate then search real estate related blog and put unique content related to real estate or your opinion on blog . This is also Latest Google Panda Update.

How to search Blog :

1.  intitle:keywords site:blogspot.com "Post a comment
2. "keywords" "Allowed HTML tags:"
3.   intitle:"keywords" intext:"add a comment" // intext -> should add a comment