Google has updated its Penguin algorithm with the new 3.0 iteration, making it a major update since last year when Penguin 2.0 was rolled out. The original filter was introduced in 2012 and it was designed to target sites deemed to be spammy, especially those violating Google's guidelines regarding link-building. Google has improved this filter and the Penguin 3.0 is said to be much more efficient, although we don't yet know exactly how much.
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