Mobile Websites are important

Why mobile compatible websites are so important:
The Google MobileGeddon

Google recommends now mobile friendly websites either built on a responsive technology or by using separate mobile sites. Both approaches serve, each, specific purposes depending on your business.  Users do not search for the same things on mobile devices as on desktop PCs.

Your website might not be compatible with Google’s algorithm update of April 21st 2015.

Test it yourself: Mobile friendliness test