Digg combats SEO spam
Social news website Digg
has altered the way it values external links. The site now uses a new algorithm to determine the authenticity of links submitted by users, adding a rel="nofollow" tag to those it suspects of being spam.
A statement on the official Digg blog said:
"W?ve made a few changes to the way Digg links to external sites that may impact some folks in the SEO community. These changes reduce the incentive to post spammy content (or link spam) to Digg, while still flowing 'search engine juice' freely to quality content."
Digg.com offers users the chance to post a comment - including a link - in any article. This policy is popular with SEO professionals as it passes PageRank onto an external source.
SEO community reacts to the news
The move has been met with a mixed reception. Matt Cutts, Google's head of webspam, praised the new procedure:
"I think this is pretty smart. Digg is?t adding nofollow to everything, just the links that the?re less sure about. Once a story looks real to them, I can imagine that they would lift the nofollow."
Other SEO commentators were less certain about the new policy. Popular SEO blog Dailyseoblog.com debated how the new algorithm would define spam links. One article on the website asked, "How they decide wha?s trustable and wha?s not is really important."