Communication takes many forms, including verbal, non-verbal, written, and visual. Verbal communication includes language, sounds, and tone of voice. Non-verbal communication conveys messages through body language and facial expressions. Written communication shares information through written words. Visual communication uses images, graphics, and other visual elements. Effective communication requires understanding the audience, and following principles such as clarity, conciseness, completeness, organization, empathy, and flexibility. It also involves communicating ethically by respecting others and the truth.