Based on this data, Onskul concludes “Normally, December is one of the calmest months when it comes to SERP volatility as Google tries to minimize potential impact before big holidays. But something happened around December 14, something that Barry Schwartz called the Maccabees Update, or the pre-holiday update. Sensor spotted the highest SERP volatility on mobile (slightly less on desktop) across most categories, most affected on mobile being Autos & Vehicles, Law & Government, Reference. In fact, right now, on December 19, Sensor is reporting another extreme spike in volatility. Now, Hobbies & Leisure, Science, Jobs & Education, Home & Garden, Internet & Telecom, have been affected the most. And the biggest fluctuations again take place on mobile.
Of course, it’s too early to come to conclusions on what’s going on and how to adjust to the changes (as we can’t really predict what exactly has changed), but what we know for now is that some new tweaks or updates were rolled out on December 19 for the US, and with a domino effect, the dramatic rise in volatility caught up in the UK, Germany, France, Australia and Spain the next day, which means that the update that was tested on the Google US on December 19 is now spreading across the world.” We also reached out to Searchmetrics for their analysis and Founder and CTO Marcus Tober noted that they prefer to conduct a deep analysis of algorithmic fluctuations after a sustained change has taken place, saying “At first we saw some changes that at first look looked like typical Panda and Phantom symptoms, but not on a large systematic scale. Many sites have lost visibility that have no Schema.org integration, but we can’t determine based on such a short time what are the overall systematic changes.”