Why Your Site Must Be Mobile in 2015: Google’s Getting Serious

If you use Google Webmaster Tools to monitor your site’s overall health and your site is non-mobile, you may have received a warning recently from Google to fix your mobile usability issues.
This is a very big deal. For Google to send out this type of mass-scale warning suggests that there will be an update to their algorithm soon that will have a much larger impact on the search engine visibility of websites that aren’t mobile-ready.

from Jurispage