Originally Posted by Lindsay Nolan
Whats the meaning of Do follow & No follow tags ?
A link that is not nofollowed is known as dofollow link. A Dofollow link is a link crawlable by search engine. Dofollow is not a tag, its an attribute you simply don’t nofollow a link if you want it be dofollowed.
A nofollow link on other other hand is one that will not be followed by a search engine robot/spider. This is accomplished by placing the rel=”nofollow” attribute in an anchor tag. This can be useful when you are optimizing a website and do not want to give the destination website credit for the backlink.
You can download this http://tools.seobook.com/firefox/seo-for-firefox.html
its highlights nofollow links in red.
Nofollow links may be used in following cases:
* Untrusted content: If you don’t want to vouch for the content of pages you link to from your site you can nofollow those links. This can discourage spammers from targeting your site, and will help keep your site from inadvertently passing PageRank to bad neighborhoods on the web. In particular, comment spammers may decide not to target a specific content management system or blog service if they can see that untrusted links in that service are nofollowed. Though this does not stop some spammers as they are out there not for backlinks purpose but also traffic.
* Crawl prioritization: Search engine robots can’t sign in or register as a member on your forum, so there’s no reason to invite Googlebot to follow “register here” or “sign in” links. Using nofollow on these links enables Googlebot to crawl other pages you’d prefer to see in Google’s index.
* Paid links: Paid links that are not nofollowed can influence search rankings,a site’s ranking in Google search results is partly based on analysis of those sites that link to it. In order to prevent paid links from influencing search results and negatively impacting users, webmasters are encouraged use nofollow on such links. Webmasters buying such links coming from sites delivering traffic wouldn’t mind the extra attribute being added to their links.
NOTE: Whether a link is followed or nofollow its still good for human visitors to your website which can turn to a client.