KakaoTalk is South Korea’s most popular messenger app. Since August 2018, RCI Financial Services Korea decided to use this tool as main gateway to communicate with its clients in allowing them to get easy access for customer support and to regularly be informed about events and on-going promotions. Within several months, number of users was significantly increased and KakaoTalk already overtook the regular website approach. RCI Financial Services Korea launched its first KakaoTalk advertising to 17 000 of subscribers in December 2019. The tool has become an essential element in the customer relationship.