Formal and informal communication is part of every organization and it would be a mistake not to accept both of these processes. Communication as a process of communicating or passing on information is a crucial topic that allows us to better understand the complexity of interpersonal relationships. Effective communication is one in which, with the mutual respect of the partners, there is an effective exchange of information between entities that are capable of their factually correct coding and decoding and can also provide (and accept) appropriate feedback. Communication feedback expresses the response to a conversation by sending signals back to the speaker. The goal of communication is to create good relationships between communicators, regardless of the specific purpose and content. It is important to identify differences in thinking and behavior in order to achieve effective communication. We can say that we communicate well with people who are similar to us. Using the principle of similarity requires a willingness to understand and share other people's thinking and reasoning. The willingness to make flexible changes is key to effective communication.