Understanding regional issues benefits candidates in the UPSC exam by offering relevant context for questions related to governance, development, and social dynamics. It enhances their ability to engage with case studies and formulate insightful answers that reflect an understanding of local contexts. Knowledge of regional concerns enables candidates to advocate for solutions that resonate with the needs of the population. Additionally, it allows for a more nuanced discussion of national policies and their regional impacts, which is often critical in interviews and essay writing.