Trying to keep on top of all the Google algorithm updates is becoming quite a task.
As we need a quick reference we thought we would put this time line together. You will find helpful links to authoritative websites who go into greater detail about some of the recent changes Google has made.
Knowing the dates of these Google updates can help explain changes in rankings and organic website traffic and ultimately improve search engine optimisation. Below, we have listed the major algorithmic changes that have had the biggest impact on search.
Panda 4.2(#28) - July 17, 2015
Google announced what was most likely a Panda data refresh, saying that it could take months to fully roll out. The immediate impact was unclear, and there were no clear signs of a major algorithm update.
The Quality Update - May 3, 2015
After many reports of large scale ranking changes, Google acknowledged a core algorithm change impacting quality signals.
Mobile Update AKA "Mobilegeddon" — April 22, 2015
In a rare move, Google pre-announced an algorithm update, telling us that mobile rankings would differ for mobile-friendly sites starting on April 21st. The impact of this update was, in the short-term, much smaller than expected, and data showed that algorithm flux peaked on April 22nd.
Penguin Everflux - December 10, 2014
A Google representative said Penguin now updates continuously, moving away from infrequent, major updates. This seems to fit ongoing flux after Penguin 3.0's release.
Pirate - October 22, 2014
Google is reported to have rolled out an update to their Pirate update which was last seen in 2012.
Pirate Update - Search Engine Land
Penguin 2.2 - October 17, 2014
Google announced that a Penguin refresh has taken place, with it set to be a long, worldwide roll out.
Panda 4.1 - September 23, 2014
Google announced a significant Panda update, which included an algorithmic component. They estimated the impact at 3-5% of queries affect. Given the "slow rollout" the exact timing was unclear.
Authorship Removed - August 28, 2014
Following up on the June 28th drop of authorship photo's, Google announced that they would be completely removing authorship markup (and would no longer process it). By the next morning, authorship bylines had disappeared from all SERPs.
Further Reading: Authorship Removed - John Mueller.
Mini Panda/SSL Update - August 6, 2014
After months of speculation, Google announced that they would be giving preference to secure sites, and that adding encryption would provide a "lightweight" rankings boost. They stressed that this boost would start out small, but implied it might increase if the change proved to be positive.
Further reading: HTTPS as a Ranking Signal - Google
Video about Panda Update:
Local Search Update - July 28, 2014
Google updated local search in the US.
Further reading: Experts Weigh Googles Pigeon Local Algorithm Update - Search Engine Land
Modern Devices Update - July 14, 2014
Google are now promoting modern websites for modern devices in Google search results. This could be a game changer for older websites.
Further reading: Promoting Modern Websites for Modern Devices
Right to be Forgotten - July 2, 2014
Google started removing posts from their search results in the EU for particular queries after a recent EU ruling.
Further Reading: Legal Right to be Forgotten - Search Engine Land
Authorship Profile Photos Removed - June 28, 2014
John Mueller announced on the 25th June that they were going to remove the profile photo from the SERPs, this seems to have taken place on the 28th June.
Further Reading: John Mueller's comment in Google+ - John Mueller
Payday Loan 3.0 - June 12, 2014
Matt Cutts announced at SMX Advanced that they would be launching the Payday 3.0 update.
Further Reading: Google Launching Payday Loan Algorithm 3.0 Targeting Spammy Queries - Search Engine Land
Panda 4.0 - May 19, 2014
A new Panda update was released and a lot of sites were affected (both positively and negatively), Ebay being one of the sites hit massively by this update.
Payday Loan 2.0 - May 16, 2014
Unnatural Link Warning - March 1, 2014
March saw more unnatural link warnings hitting websites.
Page Layout Update 3.0 - February 6, 2014
The page layout update was created to target websites which had a large number of adverts above the fold.
Further Reading: Matt Cutts, Google, Tweeter Comment
Unnatural Link Warning - January 1, 2014
In January a number of sites received a site wide penalty, knocking them out for their brand name.