nofollow is a value to the rel attribute of an HTML a element to instruct search engines that a hyperlink should not influence the link target's ranking in the search engine's index.


<a href="" rel="nofollow">Example page</a>

When to use NoFollow

  • When linking to Feedburner RSS feed
  • When linking to questionable sites
  • When linking to internal pages that don't need PageRank
  • Paid links and ads
  • Comment links