Google says about 60 percent of total Internet traffic now comes from mobile devices and they want these users to have good experiences when searching. Google first noted the changes back in February giving webmasters over two months to update their sites.
The change has already been called mobile-geddon because it is expected hurt millions of small business websites that may not be tech savvy enough to have 'mobile-friendly' experiences or are just outdated after having paid for a custom site years ago.
Source:
CNBC