Here is where you will find updates of what is changing in Google. Please note that Google does not disclose it’s inner workings, so this is not an authoritative list of every search algorithm change.
August 2018 – Broad core update with an emphasis on E-A-T (Expertise, Authority, Trust)
April 2018 – Similar to the March update, related to content relevance.
March 2018 – Core algorithm update continuing the emphasis on quality content.
March 2017 – ‘Fred’ update targets low-quality content.
February 2017 – Core algorithm update emphasizing content quality.
January 2017 – Results for sites with intrusive popups on mobile that hurt search experience were reduced in rankings.
September 2016 – Penguin Update emphasizes link quality and attempts to devalue link manipulation. Read More here.
May 2016 – Mobile Friendly Update places increasing emphasis on the mobile experience of a website.
3/7/16 – Google Posts will be a new way to get your own brand feed directly into Google results. Currently, waitlist only.
6/7/15 – Create a slideshow right within YouTube at https://www.youtube.com/upload. See “create photo slideshow” on the right side.