Mail order selling, also known as direct mail marketing, involves the sale of products or services through mail communication between businesses and consumers. There are several other terms that can be used interchangeably with mail order selling, including catalogue selling, direct marketing, direct response marketing, and distance selling. These terms all refer to the process of using print or digital materials to promote and sell products directly to customers, often without the need for face-to-face interactions. While mail order selling has been a popular sales technique for many years, the rise of e-commerce and online marketplaces has expanded the ways in which businesses can sell products and interact with customers remotely.