Deadline Looms for Mobile-Friendly Websites
Web developers who haven't yet optimized their Websites and Web apps for mobile devices may want to do so before April 21. That's the day when Google will begin taking a site's mobile-friendly characteristics into account in its search results. As a result, some are calling the day "mobilegeddon."
It isn't exactly clear what characteristics the Google algorithm considers when determining how mobile-friendly a site is. Many developers are using responsive design to create a mobile version of their sites. Experts also recommend making sure that Google's bots can crawl your mobile site and checking every page from a mobile device to make sure the navigation works as intended.