What is difference between DoFollow and NoFollow links?

It’s very important strategy for any internet marketer to build back links to your site. Though, all links are not equally valuable and some may be worthless. A lot of blogs, forums, article directories add an attribute called nofollow to their outbound links to discourage people from spamming the site with unrelated links.

The normal link represents dofollow link on a website and look like following.

  <a href="http://www.anylink.com">Any Link</a>

We can make link nofollow individually by adding an attribute rel in anchor tag like following.

  <a href=http://www.anylink.com rel=”nofollow” >Any Link</a>

We can also make all links on a page as nofollow by the meta robots tag in the head section of any html page. Meta tag will be used as following.

  <meta name="robots" content="nofollow" />

Nofollow attribute was developed in 2005 by Google to help combat link spam in the blog’s comment sections. It was designed so that webmaster could attach it to all unwanted links that are irrelevant to their site, so that Google could improve that quality of their search engine results.

Search engines consider every link as “vote” for the site linked to. Links that comes from high page rank, considered being trusted and authority and more valuable vote as compare to the links that comes from low page ranked sites. Nofollow links tells search engine spiders to ignore the link though there are few proof that nofollow links are not completely worthless but probable they aren’t enough useful anything else than low competition keywords.