This research is intended to systematize the theoretical background of chatbots and assess the factors affecting customer satisfaction when they use Facebook chatbot. The study provides an insightful analysis for planners and field workers who are involved in the promotion of Facebook chatbot for online stores in Vietnam. It suggests different recommendations and solutions for individuals and organizations providing chatbot services on Facebook platform, in order to improve service quality and operational efficiency. An analysis of 271 customers who used chatbot services pointed out and evaluated the positive and negative relationships around customer satisfaction.