With the widespread use of the Internet, the effect of workers using social media on the employer's right to terminate has become more and more controversial. As a matter of fact, in some cases, it is quite difficult to determine the existence of the right of termination and the type of termination. For this reason, this study is an attempt to examine the issue of the employees' use of social media as a reason for termination by the employer by taking relevant judicial decisions into account. In our study, the concept of social media was first examined in terms of its definition and usage types. After that, the employer's authority to regulate the employee's use of social media and its limits has been reviewed. Finally, the employee's use of social media has been evaluated in detail. In this context, this is an examination into various factors that may affect the employer's right to terminate and what should be taken into account during the termination process. Moreover, the legitimacy of the employers' access to employees' social media use has been discussed.