Communication plays a crucial role in effective persuasion by conveying messages clearly, engaging the audience, and building credibility. Effective communication helps establish rapport with the target audience, allowing for better understanding and acceptance of the persuasive message. Additionally, using appropriate language and delivery techniques can enhance the persuasiveness of the message. Understanding the audience's needs and tailoring the message accordingly through communication can increase the chances of successful persuasion. Lastly, active listening and feedback in communication can address any potential misunderstandings or objections, leading to more effective persuasion outcomes.