The Kardashev scale is a method of measuring a civilization’s level of technological advancement based on its energy consumption. It categorizes civilizations into three types: Type I, capable of harnessing all energy on their home planet; Type II, capable of harnessing energy from their host star; and Type III, capable of harnessing energy from their entire galaxy. Examples of Type I civilizations include those utilizing renewable energy sources. Type II civilizations might harness the energy of their star through technologies like Dyson spheres. Type III civilizations could potentially tap into the energy of black holes or other galactic-scale sources.