On 4/21/15, what was dubbed Google's “mobilegeddon”, came and went. And according to the Wall Street Journal," Google’s ‘Mobilegeddon’ Was a Big Deal, After All."- fullstory.
For websites not optimized for multiple screens, it will only get worse. Google has more of an incentive to continue to update search results for mobile searchers, as they recently announced that there are officially more smartphone than desktop searches in the U.S.
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