6. Discussion and conclusion
The purpose of this study is to investigate what drives consumers to build brand loyalty as they follow companies’ brand pages on social networking sites. Drawing upon the relationship quality perspective, we propose and empirically test our research model through a survey on a microblogging site. Our findings show that brand loyalty is primarily determined by relationship quality. Consumers’ relationship quality with brands can be further strengthened by three important categories of factors: the self factor (i.e., self-congruence), the social factor (i.e., social norms), and characteristics of companies’ brand pages (i.e., information quality and interactivity). These findings indicate that consumers are more likely to develop trust, commitment, and satisfaction toward a brand in social commerce if they (1) identify an excellent match between their self-concepts and the brand image; (2) want to comply with social expectations from others; (3) receive high-quality information by following the brand page; and (4) find that the company actively interacts with its followers. Further, the enhanced trust, commitment, and satisfaction toward the brand will influence consumers to repurchase its products and recommend the brand to their friends. The theoretical and practical implications of our findings are discussed below.