Retail is understood to mean commercial enterprises (occasionally also their commercial activities) which procure goods from different manufacturers, assemble them into a range or produce their own goods and sell them to non-commercial customers, i.e. consumers or end users. Accordingly, the customer group and the sales market of the trading company are used as the decisive criteria in relation to the wholesale trade. The use of modern IT and progressive networking on the Internet lead to far-reaching upheavals in business and everyday life. For retailers, the digitalization of their business opens up new sales opportunities and markets.