A big change is coming soon. A change that could heavily impact each and every e-commerce operation online. On April 21, 800-pound gorilla Google will start using “mobile-friendly compliance” as a ranking factor in smartphone search. There are many meanings to this change, but chief among them is that you should absolutely ensure that your site is mobile-friendly. In short, mobile compliance is becoming less and less of an optional indulgence. And more and more of an absolute necessity.