Some courses require you to take proctored exams to count toward your course credits. A proctor is an approved person that administers an exam and upholds the integrity the exam-taking process.
Examples of people who could serve as a proctor would be librarians, teachers, police officers, community volunteers, religious leaders, or someone who works in the public service industry.
Ineligible proctors would be family, your supervisor, a co-worker, or someone with whom you intend to be employed.
The important thing to remember about a proctor is to choose someone who does not have a vested interest in whether or not you pass the exam. If audited, you would not want your proctor choice to stand between you and your career.