If you’re reading the Moz blog, then you probably have a decent understanding of Google and its algorithm changes. However, there is probably a good percentage of the Moz audience that is still confused about the effects that Panda, Penguin, and Hummingbird can have on your site. I did write a post last year about the main  differences between Penguin and a Manual Unnautral Links Penalty, and if you haven’t read that, it’ll give you a good primer.

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