A college professor is an educator who teaches students at a college or university. They typically hold advanced degrees, such as a Ph.D. or master's degree, in their field of expertise. Professors are responsible for creating lesson plans, delivering lectures, and assessing student performance through assignments and exams. In addition to teaching, college professors often engage in research to contribute to their academic discipline. They may publish articles in scholarly journals and present their findings at conferences. Professors also mentor students, guiding them in their academic and professional development, and may serve on various committees within the institution.