Big changes to Google’s search algorithms are coming: beginning April 21, the company will increase the ranking of sites that are mobile-friendly and surface app results much higher.
Along with this change, Google will start to use more information from indexed apps as a factor when ranking search results for users that are signed-in and have the app installed.
These changes are great news for mobile users as it should help motivate those sites that still don’t have a mobile site to actually build one. Google started highlighting mobile-friendly sites in results last year.
Site admins who want to test their site’s mobile compatibility can use Google’s tools to quickly evaluate the status of a page.
➤ Finding more mobile-friendly search results [Google Webmaster Blog]