Google has announced that it will roll out a new core update starting December 3rd 2020. No further details have been provided at the time of writing.

Google claimed the bulk of indexing and canonicalization errors were fixed until October 14. There was a drop in indexed pages around October 12th.

Indexing and canonicalization bug started in early September and registered quite a few indexing errors on September 29 and 30.

Temporary changes in rankings, reverted soon after.

Massive ranking changes were reported for a few hours on August 10, 2020. Google confirmed that there was a glitch in its indexing system.

Updates affected mostly Disqus comments.

Core Update to the Google algorithm, the second biggest one since the August 2018 "Medic" update.

Changed user behavior. High rankings flux.

Most changes were reversed.

URLs in Featured Snippets will no longer be shown as organic search results, affecting rank-tracking and organic CTR.

Minor changes to the algorithm.

BERT natural language processing update was rolled out in 70 languages.

Google upgraded the algorithm and hardware to support the BERT natural language processing model.

A core algorithm update that apparently affected mostly websites that had been affected by core updates previously.

Heavy algorithm flux registered, nicknamed the "Maverick Update" by the search community.

Update that affected websites that had two or more organic listings, supposedly in order to increase site diversity on SERPs.

Update that affected a lot of UK publishers. Lower impact than the August 2018 update.

Another bug was preventing new websites from being indexed, but was fixed.

A bug from Google removed pages from the index, however, most pages recovered quickly.

Core algorithm update, nicknamed "Florida 2".

Anomalous first-page results with up to 19 results in the first page. The changes disappeared by March 6.

Mostly positive changes to the rankings.

Heavy ranking flux.

Increased usage of neural matching.

Significant changes in traffic, seems to have been an update about trust indicators for websites.

Updates that were mostly seen in the health and wellness verticals, but visible across all industries.

Chrome 68 warns users of non-HTTPS pages, considered as non-secure.

Unconfirmed by Google.

Page speed became a ranking factor for mobile results.

Organic video results were moved to a carousel-type presentation.

Heavy activity and ranking changes.

After testing longer snippets, Google went back to the 150-160 character limit.

Improvements in site quality recognized, including E-A-T update.

Mobile website versions are indexed first.

On a few questions, Google started showing zero organic results with a "see more results" button.

Changes to rich snippets detected.

Volatility in ranking positions.

Minor changes to the core algorithm.

Update on the length of snippets, increasing Meta Description Tags to 300 characters.

High amount of flux detected on Google's rankings.

There was a strong drop in featured snippets. At the same time, there was a rise in Knowledge Panels.

Chrome 62 warns users when filling out an unsecured form.

Changes impacting search visibility and traffic.

Affected mostly pages with aggressive advertising, thin content and other features that cause a bad user experience.

SERP fluctuations registered.

Fluctuations for pages ranking in positions 6-10. Food and beverage industry affected the most.

Launched including data from platforms such as LinkedIn, Monster, Glassdoor, and CareerBuilder.

Affected mostly websites with misleading advertising, thin content and UX issues.

Part of Google's strategy to favor HTTPS results in their rankings.

Update targeting low-quality content.

Algorithm update and massive SERP changes.

Seemed to affect mostly those with private blog networks and other spammy link building tactics.

It penalizes interstitials that affect user experience on mobile devices.

Google trackers showed a massive flux between December 14 and 15.

Data from SEO tracking tools indicated an update, not confirmed by Google.

Roll out of new features, cancelling out a few penalties that were applied as the Penguin core update was applied.

New update devalues low-quality results rather than penalizing websites.

Major algorithm update: real-time updates built into the core algorithm. Long roll out.

50% drop in image results, maybe part of a bigger update.

Changes in local pack results for diversification of local results.

Increase of ranking signals for mobile-friendly websites.

SEO tools registered a lot of activity on rankings.

Removal of right column ads and roll out of 4-ad top blocks on commercial searches.

Panda became part of the algorithm rather than a filter added to searches afterward. On this date, roll out began.

Several SEO tools reported a large rankings movement.

Machine learning was added to the algorithm

Data refresh stopping websites with low quality content from ranking.

Core algorithm change that relies on "quality signals".

Mobile-friendly websites get a boost in their rankings

Probably an ecommerce and mobile ranking improvement.