Google Algorithm Updates History

Every month, Google makes subtle its search algorithm. While most of these changes are minor, Google occasionally rolls out a “major” algorithmic update that affects search results in major ways.

Having a historic timetable of Google Updates allows online marketers to pinpoint specific dates when their search ranking might have been adversely affected.

2016 Updates

Unnamed Update — January 8, 2016

Multiple sites 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 limited.
Google Confirms: Core Search Ranking Update Took Place But Not Penguin Related (SER)

2015 Updates

RankBrain* — October 26, 2015

Google made a major announcement, revealing that machine learning had been a part of the algorithm for months, contributing to the 3rd most influential ranking factor. *Note: This is an announcement date – we believe the actual launch was closer to spring 2015.

Google Turning Its Lucrative Web Search Over to AI Machines (Bloomberg)

FAQ: All About The New Google RankBrain Algorithm (SEL)