Google has officially announced the rollout of its mobile-first indexing. After a year and half of careful experimenting and testing. Google has begun to start a transition to websites that follow best practices for mobile optimization, to help the majority of people who use google search on their mobile devices (mobile users).Google says, its search algorithms use the mobile version of the web page to indexing and ranking, to better help 'primarily mobile' user-base. Google continues to have the single index that it uses to serve search results, there is no separate mobile-first index from it...