ENTSO-E, or the European Network of Transmission System Operators for Electricity, is an organization that represents electricity transmission system operators across Europe. It aims to ensure a reliable, efficient, and sustainable electricity supply by coordinating the operation of the electricity grid and promoting cross-border electricity exchanges. Founded in 2009, ENTSO-E plays a crucial role in the development of a unified European electricity market. The organization works on various initiatives, including the integration of renewable energy sources and the enhancement of grid infrastructure, to support the transition towards a low-carbon energy system in Europe.