Doctoral studies, also known as doctoral research or PhD studies, involve pursuing an advanced academic degree that typically involves conducting original research in a specific field of study. These studies usually require the completion of coursework, passing comprehensive exams, and writing and defending a dissertation. Doctoral studies are usually completed over several years and are the highest level of academic achievement in most fields. This level of study allows individuals to deepen their knowledge, expertise, and contribute to the advancement of knowledge within their chosen discipline.