Geothermal energy currently covers the needs of 20% of European citizens’ via district heating and cooling. It is a versatile renewable energy source that can be deployed at any scale for many uses from space heating to industrial process heat, but also for supplying flexible renewable electricity or even produce strategic minerals such as lithium. As the EU and many other countries are undergoing a rapid intensification of their energy transition policies, geothermal energy is increasingly recognized as the missing piece of many energy and climate plans.