Case studies can be integrated into essays for the UPSC exam by illustrating points with relevant examples that provide real-world context. Using concrete data and examples enhances arguments, making essays more compelling. Candidates can adopt a format where they first introduce the issue, followed by a case study that exemplifies their viewpoint, and then draw conclusions from it. This structured presentation not only enriches the analysis but also demonstrates the ability to connect theory with practice, which is critical for any aspiring civil servant.