For these reasons, over the past few months we’ve been running tests taking into account whether sites use secure, encrypted connections as a signal in our search ranking algorithms. We've seen positive results, so we're starting to use HTTPS (HyperText Transport Protocol Secure) as a ranking signal. For now it's only a very lightweight signal — affecting fewer than 1% of global queries, and carrying less weight than other signals such as high-quality content [1] — while we give webmasters time to switch to HTTPS. But over time, we may decide to strengthen it, because we’d like to encourage all website owners to switch from HTTP (HyperText Transport Protocol) to HTTPS to keep everyone safe on the web.
Via Rob Landley's Blog Thing for 2015 [2], “Official Google Webmaster Central Blog: HTTPS as a ranking signal [3]”
And that was nine months ago. Is your website served over HTTPS?
This just appears to be yet more proof that Google is calling the shots on the web now [4].
Oh, by the way, your web server is HTTP/2 compliant [5], right? Wouldn't want anything bad to happen to your page rank [6], now would you?
[1] https://support.google.com/webmasters/answer/6001093?utm_source=wmx_b
[2] http://landley.net/notes.html#06-05-2015
[3] http://googlewebmastercentral.blogspot.jp/2014/08/https-as-ranking-
[5] http://www.extremetech.com/computing/199536-prominent-developer-