Sports mega-events have become complex, multifaceted phenomena with far-reaching impacts on host communities and nations. While these events generate substantial economic activity and global attention, they also present significant costs and risks. The anticipated benefits include economic growth, urban regeneration, tourism promotion, and enhanced international prestige. However, the substantial costs for infrastructure and security can strain public budgets long-term. Negative impacts may include disruption to local residents, environmental damage, and displacement of communities. The concept of "legacy" has become central, encompassing long-term outcomes beyond the event itself. Legacy can be positive or negative, tangible or intangible, and impact diverse stakeholders across multiple levels. Evaluating legacy is complex, requiring multifaceted approaches that consider economic, social, environmental, and other factors. Recent trends show declining interest from Western nations in hosting, but increased interest from developing economies. Future focus areas include risk management, ensuring sustainable legacies, and adapting to challenges like the COVID-19 pandemic. Balancing economic benefits with social and environmental considerations remains a critical challenge for host nations and organizers of sports mega-events.<p></p>