as i know that rel = "nofollow" means this is nofollow link. but i am getting some backlinks rel= "external" link, than please tell me whats meaning of this. and how does it different from do follow.
I have never seen this tag uses before. It does not make any sense to me to use it.. What is the purpose?
An external link is a also a dofollow link. It only means is that your link page will open in a new window
rel= "external" link is the latest web standards to open a link in a new browser window. Before: <a href="document.html" target="_blank">external link</a> After: <a href="document.html" rel="external">external link</a>
rel attribute can have many values (space separated). Many CMS including wordpress will often indicate 'external' links with rel attribute. Sometimes you might also see rel="external nofollow" and that would meant the link is to an external page and is a nofollow link.