Eric Enge from Moz breaks down the basics of machine learning with concepts and examples. Check out the section at the end titled “How machine learning impacts SEO” for some interesting insights.
No big surprises here. Google makes adjustments to the language in some sections of the guidelines and clarifies with some additional guidelines encouraging SSL, accessibility, and mobile-friendly pages.
In case you missed it and saw fluctuations in your rankings last month, Google confirmed a few weeks ago that a large update (based on reported fluctuations) occurred early January.