It is now critical to have a mobile optimised website solution for your business. Over 80% of all google searches are performed on mobile devices and this is increasing year on year. Google has also developed a separate search index for mobile and if your website is not ready for mobile then you will lose traffic and rankings in the search engine.
As well as this the google map packs (the three map listings at the top of a lot of local searches) rankings and positioning will also be affected. Without a mobile friendly website you are going to be losing customers to your competition.