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"Google's Matt Cutts announced on Twitter at 2:13am EST that Google has taken action on a \"large guest blog network.\"   This time, Matt Cutts did not specifically say which network they targeted.Matt links to his post on his personal blog named The decay and fall of guest blogging for SEO.  In January, Matt warned that guest blogging for SEO is dead, which caused a major stir in the community.Since then, many said guest blogging has continued to work and lead to great rankings.However, as you can see, today, Matt and Google went after a larger guest blogging network, which may result in lost rankings, penalties and unnatural link notifications.  I have to assume that Google will continue to go after these networks.What if you just do occasional guest blogging?  You should be fine but again, with the caveat that it is not done for SEO purposes.   Personally, I hate guest blogging but I have the luxury at writing at two sites that have a large audience already.Here is Matt's tweet:Today we took action on a large guest blog network. A reminder about the spam risks of guest blogging: http://t.co/rc9O82fjfn\u2014 Matt Cutts (@mattcutts) March 19, 2014\r\nSo which guest blog network was hit?  Rae Hoffman believes it was MyBlogGuest.  If you search for their name in Google it doesn't come up anymore:If you dig deeper, you can see that Ann Smarty, who is the owner of this service, made it clear in a blog post that they won't be nofollowing those links despite what Matt Cutts suggested in January of this year.  I guess that hard stance caught Google's attention and this is the end result?Again, we do not have confirmation from Google that it was this network that was indeed hit.Update: Now we do, Ann Smarty confirmed it on Twitter but doubts the publishers will be hit.  I suspect the publishers will indeed be hit:[Official] Even though #myblogguest has been against paying for links (unlike other platforms), @mattcutts team decided to penalize us...\u2014 Ann Smarty (@seosmarty) March 19, 2014\r\nI don\u2019t think our publishers will be penalized, but let\u2019s ask @mattcutts :)\u2014 Ann Smarty (@seosmarty) March 19, 2014\r\nUpdate 2: Matt Cutts confirmed they may take action on the publishers who participated in the guest blog network.  More details over here.Here are some recent link networks taken down by Google:\r\nGoogle Penalized Link Networks In Spain, Italy &amp; Germany\r\nGoogle To Slap Link Networks In Italy &amp; Spain\r\nGoogle Targets Poland In Latest Link Network Penalty\r\nGoogle Boots Large German Agency &amp; Clients For Link Schemes\r\nGoogle's Matt Cutts: We're Taking Action Against Buzzea, The French Link Network\r\nGoogle's Matt Cutts Calls Out Nailing Another Link Network\r\nGoogle Penalizes Another Link Network: SAPE Links\r\nGoogle Crushes Ghost Rank 2.0, A Russian Link Network\r\nBacklinks.com: The Next Link Network Penalized By Google\r\nGoogle's Matt Cutts: Text Link Ads Link Sellers Targeted\r\nGoogle Penalizes Blog Networks, Did SEOs Use It To Hurt Competitors?\r\nBeware: Google To Squash Another Link Network Very SoonForum discussion at Twitter."^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/google-guest-blog-penalty-18278.html>