Lately in the blogosphere, more and more blog owners are switching the links in their comments from NoFollow to DoFollow. Don't feel lost if you are new to blogging and WordPress when you see these words. Here are a couple of simple definitions:
DoFollow - When creating a link on any webpage using HTML, normally the code looks like this:
<a href="http://www.mysite.com/">My site name with dofollow</a>
This same link is actually the DoFollow link. DoFollow is the default attribute for an HTML link. This tells the search engine spiders that the link can be "followed" by others.
If your goal, however, is to keep the search engines from following your links, you need to add the rel="nofollow" attribute like this:
<a href="http://www.mysite.com/" rel="nofollow">My site name with nofollow</a>
When the attribute was first introduced, its main purpose was to stop comment spam on blogs, because as you may have noticed, the commentary section of many blogs can get flooded with spam if no one takes preventative measures. The attribute itself instructs the search engines to note that the specific link should not influence the link target's ranking in the index. In other words, the search engines will ignore the link.
While NoFollow links were first developed as a method for preventing blog comment spamming, many bloggers are now electing to create DoFollow blogs. The idea behind this is that it will encourage readers to come to your blog and comment more frequently - and it will help your readers to build their following as well. Even if you do choose dofollow for your blog, there are measures you can take to prevent blog comment spamming.