The document defines passive voice as using a form of the verb 'to be' with the past participle of the main verb. It is used when the focus is on the action or receiver rather than the doer. Tips are provided for identifying passive voice such as looking for 'by' and considering sentence structure with the doer as the subject. Examples of passive voice sentences are given. While passive voice can convey objectivity, using active voice promotes clarity and directness in writing. An understanding of both voices is important for effective communication.