The present manuscript examines the role of digital social influence, as attained through Facebook, Instagram, Pinterest, Twitter, and YouTube, in attracting customers and achieving sales performance. The theoretical mechanism that serves as the basis for the study is social legitimacy theory. Specifically, the influence exerted by social media and the resulting social legitimization of the marketer is expected to drive both website visits and, ultimately, sales for the USA’s largest e-commerce retailers. The findings demonstrate that all five indicators of social media influence converge into a single variable with significant loadings. This provides support for the multidimensional nature of the hypothesized digital social legitimization construct. However, the analysis of the structural equation model indicates that there is not a direct link between digital social legitimization and Web sales performance. Nevertheless, digital social legitimization does in fact positively impact website visits. In turn, these visits are associated with higher e-commerce sales. Thus, marketers are advised to use social media to help legitimize the e-commerce brand and drive website traffic.