According to several SERP tracking tools, there has been a significant boost in the percentage of "mobile friendly" websites ranking on page one in Google Search on Tuesday. You can read more about the Mobile-Friendly Algorithm here, which was fully rolled out by the beginning of May last year.
The latest volatility was reported by AccuRanker's Google Grump tracker and shows an apparent divergence between Mobile Rankings (which spiked) and Desktop Rankings (which remained static):
The data below is combined for all of AccuRanker's global locations (US, Australian, UK and other European locations). We did test each of the locations separately, and all show similar movement.
Similarly, Dr. Pete Meyers at Moz also noticed significant changes on Tuesday:
This is not the first time massive changes have been spotted in the Mobile SERPs, with Dr. Pete seeing similar temporary fluctuations to 88.7 percent of mobile-friendly URLS on page one on the 5th February, which reverted on the 6th February to the previous level of 81 percent.
Google Switches Focus to Mobile Throughout 2016
Between mobile-friendliness rankings boosts and the new Accelerated Mobile Pages project, or AMP project, significant attention is being made to mobile usability and speed by Google throughout 2016. This is hardly a surprise with the ever increasing use of Mobile for carrying out web searches.
Just take the recent Super Bowl 50 as a prime example. During the 2015 Super Bowl, 70 percent of the TV-ad-driven searches were made via mobile. This year, that increased to a massive 82 percent, with a further 7 percent made on a table.
The scope of this article does not include a detailed summary of AMP, but suffice to say, in return for producing these versions of the pages, you may get increased exposure in the Mobile SERPs. Also, your AMP page may be being cached around the World on Google's servers directly to improve the speed at which your AMP page loads.
Furthermore, there are reports that Google has entered into an agreement with Level 3 Communications to increase significantly the capacity of its Network Infrastructure, presumably (although this is speculation on our part) to prepare for the rising network traffic AMP pages will cause.
Editor's Note: Feb. 11, 2016 — Dr. Pete Meyers at Moz has been digging into the data, and it would appear that the volatility may have been caused by a sudden jump in deep-linking on Android:
May have solved the mobile flux mystery. Looks like a sudden jump in deep-linking on Android. Will know more tomorrow.— Dr. Pete Meyers (@dr_pete) February 11, 2016
We will update this article once we know more.