Forum Moderators: Robert Charlton & goodroi
Google Updates and SERP Changes - December 2017
but your site doesn't need to
USE HTTPS — When creating AMP pages and content, you should strongly consider using the HTTPS protocol (vs. HTTP). Although, HTTPS is not required for the AMP document itself or for images and fonts, there are many AMP features that require HTTPS (e.g., video, iframes, and more). To ensure your AMP pages take full advantage of all AMP features, use the HTTPS protocol. You can learn more about HTTPS in "Why HTTPS Matters".
Google said in google first index you have to serve pages with the same url in desktop and mobile
I can't agree with that. My major site is most definitely seasonal both in page views and earnings. The lowest compared to the highest season must be a factor of 8 or more.