The problem for those without a mobile site is twofold. First, consumers demand it. Google reports that 57 percent of users won’t recommend a business with a poorly designed mobile site, and 40 percent go to a competitor after a bad mobile experience.
Second, you’ll get fewer visits with a non-mobile site. Three months after Google launched its new algorithm last year that penalized the mobile search rank of web pages that were not optimized, almost half of non-mobile-friendly web pages experienced a loss in page rank.