Communication is the exchange of information, ideas, thoughts, and feelings through speech, signals, writing, or behavior. There are various types of communication including verbal, which uses words, and nonverbal, which uses body language and other cues. Communication can occur between individuals, in small groups, from one person to a larger audience, or through mass media to wide audiences. Barriers to effective communication include physical, perceptual, emotional, cultural, and language barriers. These barriers can be overcome through clear messaging, feedback, awareness of one's state of mind, and using multiple communication channels.