The UPSC evaluates candidate essay writing skills primarily in the Mains examination, where a dedicated essay paper assesses clarity of thought, coherence, and ability to articulate ideas. Candidates must present nuanced arguments while addressing diverse topics. The evaluation focuses on structure, grammar, and overall presentation, including the ability to engage with the topic critically and creatively. To prepare effectively, candidates are recommended to practice writing regularly, read high-quality essays, and seek feedback. This practice not only enhances writing skills but also aids in refining one's thought process, which is essential for conveying complex ideas clearly.