Communication is defined as the exchange of verbal and non-verbal messages through a medium between a sender and receiver. For communication to be effective, the message must be understood by the receiver in the same way intended by the sender. Communication flows in various directions within an organization, including downward from managers to subordinates, upward from subordinates to managers, and laterally between peers. Effective communication is important for management functions like planning, organizing, leading, and controlling, and promotes motivation, decision making, and socialization within an organization. Barriers to communication can occur from differences in perception, information overload, inattention, and other factors.