[Rozwiązany] Google Algorithm Change History
Unnamed Major Update — December 14, 2016
Multiple Google trackers showed massive flux around December 14-15, including a rare MozCast temperature of 109°F. Webmaster chatter was heavy as well, but Google did not confirm an update.
Unnamed Major Update — November 10, 2016
MozCast detected a major (106°) spike on November 10th and another on the 18th. Industry chatter was high during both periods, with some suggesting that the second spike was a reversal of the first update. Google has not confirmed either event. Many people reported bad dates in SERPs during the same time period, but it's unclear whether this was causal or just a coincidence.
Penguin 4.0, Phase 2 — October 6, 2016
The second phase of Penguin 4.0 was the reversal of all previous Penguin penalties. This seemed to happen after the new code rolled out, and may have taken as long as two weeks. Post-Penguin activity had one final peak on October 6th (116°), but it is unclear whether this was Penguin or a new update. Algorithm temperatures finally started to drop after October 6th.
Penguin 4.0, Phase 1 — September 27, 2016
The first phase of Penguin 4.0, which probably launched around September 22-23, was the rollout of the new, "gentler" Penguin algorithm, which devalues bad links instead of penalizing sites. The exact timeline is unconfirmed, but we believe this rollout took at least a few days to fully update, and may have corresponded to an algorithm temperature spike (113°) on September 27th.
Penguin 4.0 Announcement — September 23, 2016
After almost two years of waiting, Google finally announced a major Penguin update. They suggested the new Penguin is now real-time and baked into the "core" algorithm. Initial impact assessments were small, but it was later revealed that the Penguin 4.0 rollout was unusually long and multi-phase (see September 27th and October 6th).
Image/Universal Drop — September 13, 2016
MozCast recorded a nearly-record 111° temperature and a 50% drop in SERPs with image (universal/vertical) results. The universal result shake-up opened up an organic position on page 1, causing substantial ranking shifts, but it's likely that this was part of a much larger update.
"Possum" — September 1, 2016
While unconfirmed by Google, MozCast recorded extreme temperatures of 108° and a drop in local pack prevalence, and the local SEO community noted a major shake-up in pack results. Data suggests this update (or a simultaneous update) also heavily impacted organic results.
Mobile-friendly 2 — May 12, 2016
Just more than a year after the original "mobile friendly" update, Google rolled out another ranking signal boost to benefit mobile-friendly sites on mobile search. Since the majority of sites we track are already mobile-friendly, it's likely the impact of the latest update was small.
Unnamed Major Update — May 10, 2016
MozCast and other Google weather trackers showed a historically rare week-long pattern of algorithm activity, including a 97-degree spike. Google would not confirm this update, and no explanation is currently available.
AdWords Shake-up — February 23, 2016
Google made major changes to AdWords, removing right-column ads entirely and rolling out 4-ad top blocks on many commercial searches. While this was a paid search update, it had significant implications for CTR for both paid and organic results, especially on competitive keywords.
Unnamed Update — January 8, 2016
Multiple tracking tools (including MozCast) reported historically-large rankings movement, which Google later confirmed as a "core algo update". Google officially said that this was not a Penguin update, but details remain sketchy.
Intrusive Interstitial Penalty — January 10, 2017
Google started rolling out a penalty to punish aggressive interstitials and pop-ups that might damage the mobile user experience. Google also provided a rare warning of this update five months in advance. MozCast showed high temperatures from January 10-11, but many SEOs reported minimal impact on sites that should have been affected.
Unnamed Major Update — February 1, 2017
There was a period of heavy algorithm flux starting around February 1st and peaking around February 6th. It is unclear whether this was multiple algorithm updates or a single update with an extended roll-out, but anecdotal evidence suggests at least two updates.
Unnamed Major Update — February 6, 2017
Algorithm changes beginning on February 1st continued for a full week, peaking around February 6th (some reported the 7th). Webmaster chatter and industry case studies suggest these were separate events.
"Fred" (Unconfirmed) — March 8, 2017
Google rolled out what appeared to be a major update, with reports of widespread impacts across the SEO community. Gary Illyes jokingly referred to is as "Fred", and the name stuck, but he later made it clear that this was not an official confirmation.
Google Tops 50% HTTPS — April 16, 2017
According to our MozCast 10K tracking set, half of page-1 Google organic results were secure/HTTPs as of mid-April. This increased to close to 75% by the end of 2017.
Unnamed Update — May 17, 2017
MozCast and other tools tracked a massive, multi-day spike that kicked off around May 17th. This preceded a sustained period of high algorithmic flux that may not have settled down for months.
Google Jobs — June 20, 2017
Google officially launched their jobs portal, including a stand-alone 3-pack of job listings in search results. These results drew data from almost all of the major providers, including LinkedIn, Monster, Glassdoor, and CareerBuilder.
Unnamed Update — September 27, 2017
Algorithm trackers (including MozCast) and webmaster chatter spotted increasing flux starting around September 25th, which seemed to spike on the 27th, after a period of relative calm. No update was officially confirmed.
Chrome HTTPS Warnings — October 17, 2017
With the launch of Chrome 62, Google started warning visitors to sites with unsecured forms. While not an algorithm update, this was an important step in Google's push toward HTTPS and may have a material impact on site traffic.
Featured Snippet Drop — October 27, 2017
Over a period of a few days from October 27-31, there was a substantial drop in Featured Snippets. This co-occurred with a jump in Knowledge Panels, as Google seemed to add many panels for broad terms and objects ("travel", "toilet", "web design", etc.). Some of these panels disappeared around December 15.
Unnamed Update — November 14, 2017
Algorithm trackers and webmaster chatter detected a high amount of flux, peaking (in our data) around November 15. Google did not confirm an official update.
Snippet Length Increase — November 30, 2017
After testing longer search snippets for over two years, Google increased them across a large number of results. This led us to adopt a new Meta Description limit -- up to 300 characters from the previous 155 (almost doubling). Google confirmed an update to how snippets are handled, but didn't provide details.