The purpose of this study is to discover how electronic word of mouth engages users and encourages them to purchase. By proposing the concepts of electronic word of mouth as different ways to provide reciprocal experience, this study develops a model that explores the antecedents of electronic word of mouth and its role in explaining a consumer to purchase in social commerce. For this, this study surveys 352 consumers using social commerce in Korea and analyzes the data using AMOS 24. In the results, first, information quality, information credibility, needs of information, and attitude towards information increase consumer electronic word of mouth. Second, the consumer's electronic word of mouth increases their purchase intention. Finally, information quality and attitude towards information among the antecedents of consumer electronic word of mouth increase his or her purchase intention through his or her electronic word of mouth. The findings contribute to research on social commerce by paying scholarly attention to meaningful engagement characterized by electronic word of mouth.