Hà Nội is witnessing an impressive growth of users for different areas, including especially technology and online service. In order to fully capture this potential, the businesses need to adopt effective customer development strategies. One of the important factors is consumer demand and preference analysis. Moreover, creating a good user experience is an integral part of customer development strategy. Successful brands focus on improving service, building trust, and bonding with the customer. Moreover, Hanoi can become a perspective center for user growth due to the development of infrastructure and information technologies. It creates opportunities for businesses to implement more flexible and innovative customer development strategies. Finally, in order to sustain the organic growth of clients and user, the companies in Hanoi need to continuously update and adjust CDSs according to the market trends.