PageRank is a very important factor if you want your blog to rank higher in Google searches. There are many factors which affect your PageRank which we won’t go in detail now. But I will only discuss two factors here – Inbound and Outbound Links.
First one – PageRank is directly proportional to the number of unique pages that are linking to your website. If you have high number of backlinks from the sites with good PageRank, you will have a high PageRank.
Another factor which affects PageRank is Outbound Links – Links from your website to another websites. If you have many outbound links to another websites, it can also affect your overall Pagerank. So, it is always advisable to add “nofollow” to rel-attribute to most of the external links on your website. Keep the PR juice reserved for your own pages and you can also remove the no-follow attribute from guest writer’s links, or links to your other personal blogs, or links to high-authority websites like Google, Techcrunch, etc.
Now if you have a old website/blog and you haven’t add the ‘Nofollow’ tag to outbound links in your old posts, there is a WordPress plugin to do that automatically.
WP External Links is a great plugin to automatically add “nofollow” to rel-attribute to all the external links on your website. You can also add settings like Open external links in a new window/tab, XHTML strict, set icon, set title, add class and many other.
It is a SEO friendly plugin which works like a charm.