Everyone knows that e-commerce is a constantly growing part of the larger retail and commerce landscape, but did you know that mobile commerce is growing at an even faster rate? Given the growing number of smartphone and tablet users, this is understandable, but there are still a lot of e-commerce retailers out there that have not been keeping up with the times and are still serving up unoptimized, unresponsive online stores to mobile users that can very easily drive mobile customers away.