What is Dofollow and Nofollow?

Both Dofollow and Nofollow are associated with search engines and SEO.

Nofollow is an HTML attribute value used to instruct some search engines that a hyperlink should not influence the link target's ranking in the search engine's index. It is intended to reduce the effectiveness of certain types of search engine spam, thereby improving the quality of search engine results and preventing spamdexing from occurring. And Dofollow is opposite to nofollow.

In fact, if you’ve been doing any kind of reading about link building, then you’ve probably seen people mentioning “nofollow” and “dofollow” links.

getbrowser have written a nice definition of what those mean, but I will give you another answer style.

So, when you have a somebody's link on your site, if you use a nofollow atribute, for that somebody is like you don't have the link at all. It may send him some traffic but is useless for SEO (search-engine optimisation).

So, if you run a blog or a forum, making the links to be "dofollow" will help you to attract more commenters/posters, as they are attracted to write on your blog/forum and leave a link to their own site. Also, those people will keep coming back to make posts/comments, for the very same reason. Is a sort of win-win deal.

They win a link-back (and need tons of), you win a unique visitor (traffic).

Do not expect imediate results. Number and quality of visitors are directly related to your content ..