As part of your internet presence, it’s vital that your website be mobile friendly for all devices including smartphones and tablets. Because of the explosive rise of searches done on mobile devices, Google changed the way websites will be ranked in mobile searches. A website must be mobile friendly—either responsive (which adjusts to whatever device it’s viewed on) or as a separate version of the desktop site. The aim is to make searching easier and more meaningful for people using mobile devices because that is how today’s internet searches are increasingly conducted.
As a result of this change, Google will penalize websites that do not show up well on phones and other mobile devices. If, for instance, the content appears disorganized or too small, links are too close together, phone numbers are not click-to-call, or if navigation is difficult, your website ranking will slip.
For another thing, people expect you to have a mobile presence. Do you really want those potential customers to have a hard time finding you, especially when they can find your competitors right in their pockets?