Communication is defined as the exchange of facts, ideas, opinions, or emotions between two or more people. It has key features of being a two-way process, creating shared understanding through a meaningful message, and requiring effective means and language. The main purposes of communication are to establish goals, develop plans, organize resources, select and develop members of an organization, provide leadership, and control performance. Communication can occur between individuals or groups through different models and involves a process with potential barriers and measures to ensure effectiveness.