May 9, 2017. Google will no longer consider pages with intrusive interstitials as being mobile- friendly. Bottom line: Obstructing content on mobile with ads or other popups is against Google's guidelines. The main target of this update is overlays that gray out the content, making the content inaccessible for a few seconds. This time it is aiming at sites that use intrusive interstitials. Google says, How significant is this new…