Link-building Tips and Tools for Bloggers in a Post-Panda and Penguin World
ProBlogger
AUGUST 15, 2012
This affected anyone who used article marketing as a way to build links and drive traffic to their websites, since article networks were hit the hardest , though some—like HubPages— regained their rankings in subsequent updates. Later, social networks like Digg, Last.fm, and others were affected as well.
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