Geothermal energy is thermal energy generated and stored within the Earth, originating from its formation, radioactive decay, and volcanic activity. This energy is characterized by the geothermal gradient, which measures the temperature difference between the Earth's core and its surface. The continuous conduction of heat from the core to the surface is a key aspect of geothermal energy. Understanding these processes is essential for harnessing geothermal energy effectively. Overall, geothermal energy represents a significant and sustainable energy source.