Public speaking ethics guide behavior and decision-making, emphasizing honesty, respect, responsibility, and fairness. Ethical violations can range from plagiarism to hate speech, with consequences damaging credibility and relationships. Strategies for ethical communication involve truthfulness, respect, responsibility, and fairness. Modern public speaking presents new ethical challenges related to technology and diverse global audiences. Applying ethics in speech preparation requires careful consideration of content, sources, and potential impacts. Case studies help illustrate ethical principles and challenges in real-world situations.