Persuasive speech is a communication method aimed at convincing an audience to adopt a specific viewpoint or take action. Key characteristics include engaging introductions, the speaker's credibility, logical structure, effective pacing, and impactful conclusions. Types of persuasive speeches include those that question facts, values, and policies, as well as those that refute opposing claims, all supported by prosodic features and followed by specific do's and don'ts for effective delivery.