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No Follow attribute

The No follow attribute tag is a way to tell search engines not to follow the link to other pages. In terms of link juice, with a no-follow tag, the link juice gained by the URL mentioned in the link is zero. The no-follow attribute can appear as a meta tag (making all links on that page as no-follow) or within a link.  

For example  

As a meta tag: content="nofollow" />
Inside a link: rel="nofollow">Login  

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