In one-way communication, information is transferred from the sender to the receiver without any opportunity for the receiver to give feedback to the sender. Oneway communication is most often used to give factual information or to persuade or manipulate the receiver to act a certain way. It is not considered an effective principle of communication. Effective communication is always two-way, where feedback is an indispensable feature, which means audience participation exists. Persuasive and convincing dialogue makes communication effective. Strategic use of grapevine or informal communication at the workplace also gets good results.