The topic of this final paper is the role and importance of non-verbal communication as a tool of persuasion in public speaking. The paper deals with the topic of verbal and non - verbal communication, emphasizing non - verbal communication tools. First, the paper defines the types and concepts of communication and public appearance. Then, a case study of non-verbal communication in a public appearance was processed on the example of the former president Kolinda Grabar Kitarović, using a video clip from her pre-election performance as part of the election campaign. At the end of the paper, the respondents' answers obtained by an anonymous online survey are presented, the results of which confirm or refute the theoretical assumptions related to non-verbal communication, public speaking and persuasion techniques. The results are explained by the method of comparison, textual analysis and pictorially presented in various graphs. The importance of paraverbal communication is also studied in the survey questionnaire. Nonverbal communication had a significant impact on the overall impression in the said case, mainly negatively.