This change has been named mobilegeddon by the blogosphere. Google has stated that it is not an earthquake that could potentially ruin a business, but a more subtle evolution of how users search for content online. For anyone that is selling online, appearing well in the results of search engines like Bing and Google is vital to their online footfall and viewership.
Google is trying to reassure website owners that this won't be an earthquake which turns their businesses upside down but quite a subtle evolution. But this is still the biggest change in the algorithm since Google's 2011 panda update that cracked down on unscrupulous linkbuilding.
As top studio for webdesign Worcester, WitsEndWizardry can build both mobile friendly, adaptive and responsive websites that will perform well in the usability tests that Google relies on.