Nofollow



Nofollow links don't allow their links to be followed by search engine bots. This means that if a web page owner is linking back to you with a nofollow link, then it will not pass through link juice. Only people will be able to follow these links.

Important Notice: Recently Google announced that they would count nofollow backlinks as outgoing links in terms of distribution of your website's Pagerank.

A nofollow link becomes nofollow when you add the rel="nofollow" tag to the linking HTML code



Example of Nofollow Link:

<a href="http://www.google.com/" rel="nofollow">Google</a>



Dofollow



On the other hand, dofollow backlinks enable all search engines to follow them for reaching a website, giving you more link juice by providing you with a backlink. If a website owner links back to you with a dofollow link, search engines and people will be allowed to follow the link. The best dofollow link is a backlink where it is allowed to place a keyword as your anchor text. Means, when you get a high PR dofollow backlink, you should use specific keywords as your anchor text to gain a push in rankings.



Example of Dofollow Link:

<a href="http://www.google.com/">Google</a>



Note: By default all the hyperlinks are dofollow. So, you don’t need to do anything to make a link do-follow.