The success of commercial banks in any country depends on the volume of sales of their services and goods, the ability to attract new customers, retain its existing market share, competitiveness, speed of adaptation to crises, new market conditions and scientific achievements. In contemporary conditions, bank marketing is becoming absolutely accessible for the successful development of any financial and credit institution. A competent study and application of the experience of foreign banks will allow domestic ones to improve the marketing technologies used, thereby developing faster. The purpose of the article is to study the practice of banks in the field of marketing in South Korea, an Asian country whose marketing is developing at an incredible speed. The article discusses the effective practice of the marketing departments of various South Korean banks (Shinhan, KakaoBank, Hana Bank, Woori Bank, KEB Hana Bank, Line Bank, etc.), whose approaches can be used by domestic banks, as well as trends in the banking market. The authors analyze the experience of Korean banks: Internet banking, Customer Relationship Management, cloud technologies, digital marketing. The article discusses the historical background of the “miracle on the Hangang River”, the typical behavior of Korean consumers, the rapid growth of KakaoBank. As a result of the study, guidelines for the development of marketing in Russian banks were determined, based on the experience of banks in South Korea and the specifics of Russia.