A well-structured essay for the UPSC Mains should have a clear introduction, a coherent body, and a thoughtful conclusion. The introduction should state the thesis and set the context. The body must develop ideas logically, using subheadings when necessary, and include examples and data to support arguments. Each paragraph should flow seamlessly into the next, maintaining thematic unity. Conclusively, summarizing key points while offering meaningful insights or solutions can enhance the essay’s impact. Clarity, coherence, and relevance are pivotal in ensuring a high-scoring essay.