All has been quiet on the Google front for the past few years. We’ve seen some significant changes to SERP layouts, and some tweaks like the mobile-friendly update and of course, RankBrain, but when it comes to major updates like Panda and Penguin, Google’s been relatively stable. Now, after an extended hibernation, Google has officially announced its latest Penguin-related release, which most of us in the search community are calling “Penguin 4.0.”
The update makes some major changes to how Penguin operates, and if your strategy includes any search engine optimization (SEO), you need to know how this affects you.
A Brief History of the Penguin Algorithm
First, in case you aren’t familiar with Google’s update history, Penguin was an algorithm update that first came out in 2012. The Panda update, which came a year before in 2011, dramatically overhauled the way Google evaluated content quality, penalizing sites with “thin” or spammy content, and rewarding sites that offered rich, detailed, valuable content. Penguin did something similar for links, penalizing sites with questionable links pointing to them, or those coming from low-quality sites. It also rewarded sites with better-quality inbound link profiles.
Penguin was followed up with significant adjustments (Penguin 2.0 and 3.0), but also a series of smaller updates, and what we called “refreshes.” Unlike the majority of Google’s search algorithm, Penguin didn’t update constantly; instead, it was subject to periodic data refreshes, which could update Google’s interpretation of your current link profile.
For example, if you built some bad links that warranted a penalty, you might have had to wait months—for the next refresh—to see the effects. Similarly, companies who were working to get out of Google’s doghouse (or penguin house) by removing links that had caused them to become penalized had to wait until the next refresh to see the fruits of their efforts.