Communication is the exchange of thoughts, messages or information through speech, visuals, signals, writing or behavior. It involves a sender transmitting a message to a receiver. Barriers like noise, language differences or selective perception can distort communication. Within organizations, communication can flow vertically between levels of management, horizontally between peers, or informally through the grapevine. Both verbal and nonverbal communication, as well as written, oral and electronic channels are used to exchange different types of messages and information formally and informally. Distortion of messages is common as communication passes through different people and levels in an organization. Strategies like encouraging feedback, using simple language and controlling communication flow can help improve effectiveness.