These two social influences have different goal orientations. The normative social influence relates to self-maintenance and compliance, while the informational social influence is associated with knowledge [7]. In other words, the normative social influence means that people are influenced by group compliance and the informational social influence indicates that people are influenced by knowledge and evidence. These two kinds of social influences have been proved to affect consumer behavior both offline [7] and online [27]. Compared with past times, where individuals’ influence is limited due to their narrow social circle, in the Internet with social media, individuals’ influence is broader and stronger, making it more important to their lives.