Some clients want the ability to place links in the sidebar of their blog. Someone along the timelines of weblogs this became known as the blogroll. With WordPress it is easy for clients to manage their blogroll.
However, there is one caveat to having a blogroll on your blog. Google may misinterpret these links as paid advertisements. After all, if you have a site with high traffic stats those links could be worth $$$ to advertisers. As a a result, blogrolls can have a negative impact on your page rank.
The question becomes: How can I provide clients with a blogroll without their search engine rankings suffering heavy losses. The answer: the rel=”nofollow” attribute.
The Blogroll Nofollow WordPress plugin will automatically do the job for you. Just download, upload to /wp-content/plugins/ and activate it from within the WordPress Admin control panel.