There are many definitions of marketing and there are also controversies about that, but lately these definitions have been updated. Marketing is the science, the practice, the process of creating and managing the market. One of the basic principles of marketing is to answer the question who the buyers of goods and services are. The most important characteristics of modern marketing are the quality of the offered information content and interactivity. Modern banking is characterized by a multitude of types of banks as a result of the most demanding banking services in accordance with the criteria of deadlines, risk and scope. Bankers persistently resisted internet marketing for a long time, because the business of banks is based on trust in institutions and the sense of security when it comes to deposits. Electronic commerce is a new way of doing business that has been developed by using a series of new tools and services and it contains the combination of all forms of information technology in order to improve and change the business practice. Since Internet and mobile banking is more present today, the goal of the banks is the safety of clients when these types of banking are used and protecting them on the way of using the modern technology. In addition to standard banking services, such as viewing account balances and obligations and all types of payments, in recent years Internet banking has been in significant progress and offers a range of other services. The purpose of this study was to show the impact of new technologies on the development of distribution channels of banks. In accordance with that, the operation of two leading banks on the Croatian banking market was described, as well as the methods used for the promotion of modern banking. Furthermore, the survey was conducted on the satisfaction of customers with the Internet and mobile banking and the services they provide.