Electricity transport across borders has become a fundamental aspect of the modern global energy system, enabling nations to strengthen their energy security, stabilize supply, and balance costs. This practice, known as cross-border electricity trade, is primarily driven by economic, geographic, and technological factors. Some countries generate more power than they consume due to natural resource availability, while others face shortages and depend on imports to meet demand. Interconnections between national grids allow for efficient utilization of resources, encourage renewable integration, and reduce the risk of blackouts. Technically, cross-border electricity transport relies on high-voltage transmission systems, with High Voltage Direct Current (HVDC) technology being the most widely used because it reduces energy losses over long distances and allows asynchronous grids to connect. Key infrastructure includes converter stations, overhead lines, and undersea cables, all of which require significant investment but provide long-term benefits for both exporters and importers. Globally, several countries stand out as major electricity exporters. France is one of the largest, leveraging its extensive nuclear power fleet to export surplus electricity to neighbors like Italy, the UK, and Germany. Canada is another top exporter, sending significant amounts of hydropower to the United States, thanks to its vast water resources. Paraguay, with its massive Itaipu Dam, exports most of its generated electricity to Brazil. Other leaders include Sweden, exporting surplus hydropower and wind energy across Scandinavia and Europe, and Switzerland, which plays a pivotal role as a trading hub due to its central position in Europe. Overall, electricity transport between countries is not only a matter of economic advantage but also a key enabler of decarbonization, as it allows renewable energy to flow seamlessly across borders, supporting a more resilient and sustainable energy future.