The master's thesis examines the communication skills of leaders. Communication skills are crucial for the successful performance of any job. Communication takes place every day, every moment, on multiple levels - verbally and non-verbally. This is why it is extremely important for (future) leaders to work on their communication skills. Although leadership has a positive connotation, many leaders are remembered as "bad" precisely because of inadequate communication, which is evident from numerous examples of historical figures. In addition, a review is given of the qualities that every (successful) leader should have and the very determinants of leadership. Leaders and bosses are quite often identified, but there are huge differences between these concepts and functions. In the simplest way, it can be said that you work for the boss (a deviation is characteristic), and you work with the leader (part of the team). The main goal of this paper is to look at the communication skills of leaders (passive, assertive and aggressive style) in the context of leader success. An additional goal is to analyse the main characteristics of successful leaders. The purpose of this paper is to point out the importance of the appropriate communication style of the leader. Ultimately, the challenges of communication in the digital environment were recognized and recommendations for improvement were given.