Communication is essential in organizations to effect change and influence action. It involves sending and receiving messages between people linked together to achieve common goals. Leaders are responsible for setting the tone for effective communication through various channels like written, oral, nonverbal, and electronic means. Barriers can occur if messages are unclear, assumptions are not clarified, messages are poorly expressed, or if there is distrust. Improving communication involves clarifying ideas, understanding contexts and audiences, and ensuring actions match communications.