Google announces Significant Algorithm Changes on April 21, 2015 to Favor Mobile-Friendly Websites Gallery Google announces Significant Algorithm Changes on April 21, 2015 to Favor Mobile-Friendly Websites Google announces Significant Algorithm Changes on April 21, 2015 to Favor Mobile-Friendly Websites Google announces Significant Algorithm Changes on April 21, 2015 to Favor Mobile-Friendly Websites admin 2018-04-27T09:35:50-07:00