What is Nofollow?
Nofollow is a value that can be assigned to the rel attribute in HTML, for the purpose of not passing on SEO value.
Nofollow links are now the standard when it comes to comment links for example.
Example
Below is a link which has had a rel=nofollow attribute applied to it.
<a href="/example.html" rel="nofollow">Example</a>Meta Robots
Nofollow can also be applied to a page via the meta robots protocol.