Research on global issues can inform a candidate's answers in the UPSC examination by providing context and depth to their responses. Staying updated on international affairs, environmental challenges, and socio-economic developments equips candidates with relevant insights to enrich their essays and answers. Through thorough research, candidates can draw connections between global trends and domestic policies, showcasing analytical skills. Moreover, being well-informed allows candidates to answer questions intelligently and assertively, reflecting a broader understanding of interconnected issues. This depth of knowledge often distinguishes candidates in a competitive selection process like UPSC.