The terms 'sales' and 'marketing' are often thought of as interchangeable, but there are significant and important differences between the two. Each department plays a vital role within the business, but for best results they must be aligned. If we are to understand what the difference is between sales and marketing, we must first consider the functions of the two departments. This article will take a deeper look into the differences between sales and marketing, as well as why and how they must be in alignment.