The act of supervising an examination or test to ensure that all students adhere to the rules and regulations set by the examiners. Invigilators are responsible for maintaining a secure and controlled environment during exams to prevent cheating and ensure fairness. They also monitor the behavior of students, such as checking for any prohibited materials or behaviors that violate exam rules. Invigilation is commonly used in educational institutions and is a crucial aspect of maintaining the integrity and credibility of exams.