In the era of global informatization, the proliferation of social media has significantly expanded its user base and application scope. Enterprises are increasingly incorporating social media training for employees to harness its potential in the workplace. This paper investigates the relationship between employees' social media usage and their performance by analyzing existing literature and conducting empirical research at KPMG. Utilizing SPSS26.0 software, descriptive, correlation, and regression analyses were performed on collected data to construct a questionnaire. The study identifies that internal social media usage duration positively influences task and innovation performance, while both internal and public social media usage frequency enhances task, relationship, and innovation performance. However, the duration of public social media platform usage shows no significant impact on work performance. The findings provide insights for adjusting social media usage policies and methods post-epidemic to enhance individual and organizational performance. Lastly, the paper suggests avenues for future research considering current data and analysis limitations.