Penguin has undergone a number of updates, all intended to promote quality content and hamper anyone practicing unethical link building. Penguin 4.0 has made two major changes that come as a welcome relief to many SEO specialists:
1. Penguin now runs in real-time.
2. Penguin is no longer a site-wide negative ranking factor.
Here are the key differences between Penguin 4.0 and previous updates and how those changes affect our website.
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