swirlMany people have been wondering whether to have nofollow or dofollow blog comments. If you do not know what they are then read  difference with dofollow and nofollow links first. This post will tell you why dofollow links were implemented and how you can benefit from having dofollow blog comments.

Nofollow vs. Dofollow

Nofollow links do not provide link juice to the page you are linking to. This means that the only reason why you should use nofollow links is not pass link juice to sites that do not deserve it. Google implemented the whole nofollow attribute for links, so that they people could prevent link juice flowing to spam sites.

The first implementation was blogs and blog comments in blogger, so that users could easily prevent people using blog comments to link to bad sites.

How nofollow links work with PageRank

Let’s think of it this way. There are two cases where you have a page that has a value of 100 ranking points. First, your page has 10 outbound links. If all of the links are dofollow, then all of the linked pages will get 10 points of value.

What if 5 of the links are nofollow and 5 dofollow? Does it mean that the five dofollow links get 20 points of value? – It does not. These five dofollow links still get only ten points and the nofollow links get zero points.

The reason for this was that hardcore SEO guys were taking an advantage of this, and increasing the rank of their inner pages by having all the outbound links nofollow. Now you know that by having nofollow comments, you will not get any more link value for your inner pages.

There is an excellent article from Matt Cutss from Google, where he describes how the nofollow links work nowadays. Read it to find out more.

Pros and Cons of Dofollow Blog Comments

Pros

  • You get more comments, because people comment more to get the backlink
  • Your inner pages will either way loose the value, so why not just spread the wealth
  • You can reward the people who actively comment

Cons

  • You may accidentally link to bad pages, if you do not pay attention
  • You will get more spam comments and have to do more comment moderation
  • Setup takes a bit of time, because comments bu default are nofollow

Conclusion

In my opinion the Pros greatly overweight the Cons. Even if the only thing you get is more comments, then dofollow comments are well worth it. Just remeber to moderate your comments and make sure that you do not link to bad sites. By bad sites, I mean spammy or very low quality sites.