A professor is a teacher at a college or university who specializes in a particular subject. They help students learn by sharing their knowledge and guiding discussions. Professors often conduct research in their field, contributing new ideas and discoveries. They may also publish books and articles, which can help others understand complex topics better. In addition to teaching, professors often mentor students, helping them with their studies and career choices. They may also participate in academic conferences, where they share their research with other experts. Overall, a professor plays a vital role in education and the advancement of knowledge in society.