Personal anecdotes contribute to compelling essays in the UPSC exam by adding a unique and relatable touch to candidates' narratives. Sharing personal experiences can effectively illustrate points, making arguments more impactful and memorable. Such anecdotes also demonstrate a candidate's ability to reflect on their journey, showcasing traits like resilience, empathy, and social awareness, which are valued in civil services. Well-timed personal stories can also engage readers emotionally, creating a connection that enhances the overall quality of the essay, thereby improving chances of scoring higher in evaluations.