Rich Ord contributed this article to WebProNews.

Highlights:

• Of the hundreds of signals Google uses to calculate rankings, Content and links are the 2 most important.
• RankBrain is #3.
• Clickthrough rate is not a direct ranking signal for Google, because it's too easy to game.
• 30x redirects no longer lose pagerank value.
• For local businesses, Google Reviews and Profile Views are by far the 2 most important ranking factors.
• Mobile friendliness is a ranking signal on mobile searches.
• Loading speed will be a separate ranking factor as of the next mobile friendliness update.

For the full story, read the article and watch the videos.