Communication involves conveying a message from a sender to a recipient through various means. There are two main types of communication: one-way communication which flows from the sender to the receiver, and two-way communication which allows feedback from the receiver to the sender. Effective communication is important for management-employee relations and coordination within organizations, but can be hindered by various personal, physical, and semantic barriers that lead to miscommunication and misunderstanding. Non-verbal cues also account for a large portion of communication and must be considered.