Today, most online searches happen on mobile devices, not desktop computers. Google is making the move to go all-in on mobile. Google claims that their algorithms will eventually primarily use a mobile version of a site’s content to rank pages over a desktop version. The main points are :
*Google Switches to Mobile First
*Optimizing for Mobile Users
*Designing for Mobile Users
*Impactful Technical Elements for Mobile
Read more - http://www.toprankblog.com/2016/12/mobile-seo-tactics/