The difference between nofollow and dofollow links. Nofollow links tell robots not to search engines and bots not to follow the link. They are primarily used to prevent paid links from influencing search results. That’s why it’s important for bloggers to include them for their sponsored content.
Nofollow links still promote awareness that there is more content on the subject to be discovered. But if you have guest posts on your blog, nofollow links help protect your site from spammers. My spam filter was down for a few days and I couldn’t believe how much spam hit my site. Google also informed bloggers that they needed to use nofollow links or risk being penalized by Google.
You can install a nofollow plug in on your site or you can put the nofollow code in by hand. I opted for the lazy plug in solution.
Dofollow links tell search engines to count the link in search.
Here are some great references for deeper reading on nofollow links: