Rolling Out Mobile-First Indexing March 2018
 
  Google announces that  after a year and a half  of careful experimentation and testing, we’ve started migrating sites that follow the  best practices  for mobile-first indexing.           To recap, our crawling, indexing, and ranking systems have typically used the desktop version of a page's content, which may cause issues for mobile searchers when that version is vastly different from the mobile version. Mobile-first indexing means that we'll use the mobile version of the page for indexing and ranking, to better help our – primarily mobile – users find what they're looking for.    Best practices for mobile-first indexing  -  https://developers.google.com/search/mobile-sites/mobile-first-indexing   Google crawlers  - https://support.google.com/webmasters/answer/1061943     Source -  https://webmasters.googleblog.com/2018/03/rolling-out-mobile-first-indexing.html   
 
