NBC reports that an undisclosed, phantom algorithm update is rolling out in Google search at this point which is primarily impactingpublishers of 'howto' style content.
Websites like eHow, WikiHow, and Answers. Glenn Gabe, of New 'Jersey based' 'G Squared' Interactive, is the one to coin the phrase Phantom update because this update came without warning, and Google has yet to acknowledge its existence.
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Through analyzing the data, Gabe has determined that this udpdate ain't related to Panda or Penguin.
Similar types of thin types content targeted by Panda are also being targeted by this update. Remember, gabe points out that clickbait articles, sites with an abundance supplementary information, pages of stacked videos, and pages difficult to navigate have all lost visibility in recent weeks.