The practice of outlining essays can significantly improve writing skills for UPSC aspirants by helping them to structure their thoughts clearly before writing. Outlining encourages candidates to identify key arguments and supporting evidence, promoting logical flow and coherence. This method also enables efficient use of time during the exam, as it can reduce the tendency to ramble or deviate from the main topic. By consistently practicing outlines, candidates enhance their ability to articulate complex ideas succinctly, which is crucial for producing high-quality essays under exam pressure.