A PhD, or Doctor of Philosophy, is an advanced academic degree that represents a high level of expertise in a specific field of study. It typically involves several years of research, coursework, and the completion of a dissertation, which is a substantial piece of original research. People who earn a PhD often pursue careers in academia, research, or specialized professional fields, contributing to knowledge and innovation. Earning a PhD can be a challenging but rewarding journey. Students usually work closely with a supervisor or mentor who guides them through their research. This degree not only enhances critical thinking and analytical skills but also opens doors to various opportunities in both industry and higher education.