In the context of an increasingly competitive market in Hanoi, the use of effective customer development strategies plays a critical role in the sustainable user growth of Hanoi. Businesses in the local market continually research and implement customer development strategies that best meet the actual needs of the market, thus enabling rapid user growth. Hanoi’s user growth originated not only from ingenious marketing strategies but also from the development of close, long-term relationships with customers provided by diligent customer service. Successful customer development strategies will play an essential role in enabling the stable future development of the Hanoi market and drive both expansion and the diversification of services to better meet users’ needs. In conclusion, the user growth of Hanoi is centrist on customer development strategies that enable a competitive advantage and long-term growth for local businesses.