Jan312009The truth about “rel nofollow”
The “rel nofollow” tag in hyperlink text is commonly thought to instruct Google and its spiders that a link should not be counted toward the target web site’s link popularity. This is enormous implications on link building efforts. First, however, a little background…
In Google’s blog, instructions to webmasters about how to avoid being blacklisted include identifying what links are “paid” versus “free”. The presumption is that Google considers that paid links should not count toward a site’s link popularity and, if it discovers that a site is attempting to distort its position in search engines through excessive spamming (buying or trading of links, posting of redundant content for SEO purposes only, etc.), that site could be penalized. One way that webmasters are asked to instruct Google’s spiders whether a link is indeed paid is by inserting the “rel no follow” tag into hyperlink text. An example of what rel no follow looks like in a link tag, ummm, follows:
<a href=”http://www.visitorcamp.com” rel=”nofollow“>Website Packages</a>
As compared to a standard hyperlink:
<a href=”http://www.visitorcamp.com”>Website Packages</a>
You can’t tell if a rel no follow tag exists unless you actually look at the page source code. In both of the above examples, the link looks like this: Website Packages .
Why should webmasters or search engine marketers care? Well, for one thing, a lot of web sites that feature link exchange now surreptitiously add the rel no follow tag into their hyperlinks. Thus, if you, an honest wbemaster, add a link to a third party site in exchange for one back, you may not actually get any benefit if the site does use rel no follow. Many major web sites like Wikipedia do this automatically.
There are many implications:
1. Many Link checkers, used to verify that site that you link to are linking back, do not check for this
2. Webmasters that manage web sites using content management solutions or databases can sometimes tweak hyperlink tags across their site very quickly – sites that used to provide link popularity can stop doing so overnight
Having said all that, the actual truth behind rel no follow is not so clear cut. Many other major search engines like Yahoo appear to ignore the no follow tag. Even Google is said to potentially include links toward pagerank in some cases according to the nofollow article in Wikipedia. Finally, even if a link does not count toward your link popularity and Pagerank, you can still benefit from web site visitors that click on it to visit you! So don’t let SEO objectives completely cloud visitor traffic and other benefits of having links simply because rel nofollow is used.
The best strategy is vigilance. Check if your link checker software detects rel no follow. Stay aware of developments in how rel no follow is evaluated by visiting the Google blog, and check the source code of sites that you partner with. You don’t have to avoid seeking links that will have a rel no follow tag, but consider whether link exchange is worth it or if its justified by other factors like traffic or visibility.
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