Blog commenting is one of the earliest ways to get backlinks to your site (or if you’re a link builder, to your client’s site). Although many seasoned internet marketers and SEO personnel no longer see this activity as an effective link building technique because aside from the implementation of the nofollow tag, which allows blog owners to stop the link juice drain from their blogs, Google seems to give less and less worth to the links found in the comment section. All these in an effort to make it harder for spammers to get a quality backlink.
But others still believe that there’s some value left in blog commenting as long as you know where to comment and how. In this link building post, I explained the attributes of a good backlink. One of the most important factors to consider among those I enumerated is if the blog you’re about to comment on is a dofollow site.