<p>Scientific knowledge advances through the continuous accumulation of primary research. However, its true value emerges when individual findings are synthesized, integrated, and organized into coherent conceptual frameworks that not only advance scientific understanding but also support evidence-based decision-making and policy development. Review papers play a central role by consolidating scattered findings, identifying patterns across studies, and providing interpretative frameworks that guide both research and policy. In rapidly expanding and highly interdisciplinary fields such as climate change science, review papers are not auxiliary products of scholarship but essential instruments for investigating and managing complexity, identifying knowledge gaps, highlighting uncertainty, and assessing scale mismatches. They are particularly important in translating heterogeneous evidence, from observational records, experiments, and modelling, into coherent narratives that can inform mitigation and adaptation strategies. Review papers vary widely in scope, methodology: some are narrative and expert-driven, while others adopt systematic or quantitative approaches such as meta-analysis. Each type serves a different purpose, and each carries specific strengths and limitations. Understanding these differences is essential for evaluating the scientific contribution of a review and for producing high-quality syntheses. This paper briefly discusses the scientific role of review articles, the diversity of review methodologies, and their specific relevance in climate change research. It also provides a detailed and practical discussion of how to design and write a review paper, emphasizing clarity of research questions, methodological transparency, critical synthesis, and conceptual innovation. Ultimately, this review argues that review papers are not secondary outputs of scientific research but primary engines of scientific progress, shaping conceptual frameworks, identifying critical knowledge gaps, directing future research agendas, underpinning global assessments, and translating scientific evidence into informed policy and societal action.</p>