I did some blog commenting but not approved why?

[Abdullah al]

I did comment some blog commenting but they not approved.Every comment was relevant.But i used coding using keywords.And i want to know what should i do when commenting? which is right way.When i comment that time use about my website comment or see review and then comment related.and also tell me coding use is correct or wrong for blog.And how the way i comment means what comment i will.Please give me answer.

[Jake]

Using a keyword as your name is obvious spam that heads up bloggers will reject.

Blog comments are pretty low value backlink sources, with the value divided by the total number of links on the page. Be sure to mix up the backlink types you ceate.