Ceramic capacitors are a type of capacitor used in electronic circuits to store electrical energy. They consist of two metal plates separated by a thin layer of ceramic material, which is typically made from a combination of metal oxides. This design allows ceramic capacitors to have high capacitance values and low DC leakage currents. Additionally, they are often polarized, meaning that the positive plate must be connected to the positive terminal of the circuit and the negative plate to the negative terminal.