In general, if a firm implements an information system and the employees use it for their work, it improves their job performance. Job performance can be defined as the degree to which one meets the formal requirements of a job and adequately completes assigned duties. In particular, they may consider supporting those employees who perform tasks with high task equivocality in making use of instant messaging platforms. Since using social media such as Facebook and KakaoTalk in the workplace improves job performance, firms may consider encouraging employees toward this practice. The results may have significant implications for firms reviewing their policies on employees’ social media use. Moreover, task equivocality had a positive moderating effect on the relationship between KakaoTalk use and job performance. The results demonstrated that both Facebook and KakaoTalk had linearly positive effects on individual job performance.

It also analyzed whether social media use has different effects on individual job performance depending on the characteristics of the given task. This study examined how using social media like Facebook (social networking sites) and KakaoTalk (instant messaging) at work affects individual job performance. The use of social media, such as social networking sites and instant messaging, in everyday life continues to spread, along with social media use in the workplace.

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