Historical documents and archives play a vital role in UPSC preparation by providing authentic sources of information on India's past. Studying primary documents allows aspirants to form nuanced perspectives on historical events, policies, and socio-political changes. Such knowledge is critical for subjects like Indian history and governance. Additionally, familiarity with historical documents aids in answering questions related to civil services and governance issues effectively. Analyzing these resources equips candidates with the necessary contextual understanding, making their responses more insightful and comprehensive during the exam.