New: A guide to Google Search ranking systems

[engine]

Google has published a new guide to its search ranking systems, which it says is now a centralised page to help it communicate how its systems work, along with updates.

[developers.google.com...]

This appears to be in addition to the other pages.
List of Google Search ranking updates [developers.google.com]
Google Search's core updates and your website [developers.google.com]
Google Search's helpful content update and your website [developers.google.com]
Google Search's product reviews update and your website [developers.google.com]
Google Search spam updates and your site [developers.google.com]

developers.google.com A Guide to Google Search Ranking Systems Google Search Central     Documentation     Google Developers Explore some of Google Search's more notable ranking systems, including systems that are part of our core ranking systems, which are the underlying technologies that produce search results in response to queries.