The statement 'I’m back! March 18th.' accompanied by an image promoting 'The Don Lemon Show' is a promotional announcement for a media event. It does not substantively engage with public issues, debates, or discussions that contribute to civic dialogue. Instead, it serves to inform an audience about the return or premiere of a television show. The content is straightforward and does not contain any elements of cyberbullying, harassment, hate speech, or personal attacks. It is not an example of public discourse as it does not address societal issues or policies.