The purpose of the UPSC's annual report includes presenting an overview of the commission's activities, achievements, and future goals. It highlights the transparency and accountability of the commission in conducting examinations and selecting candidates for civil services. Additionally, the report provides valuable insights into the examination process, including the number of applicants, success rates, and any changes made to the syllabus or examination patterns. Ultimately, the annual report serves as a crucial tool for evaluating the effectiveness of the UPSC in fulfilling its mandate.