Ceramic capacitors are a type of capacitor that utilize ceramic as the dielectric material, typically in the form of barium titanate (BaTiO3) or calcium zirconate (CaZrO3). They offer high stability and relatively low losses compared to other types of capacitors. The metal case provides excellent protection from external factors like moisture and mechanical stress. Ceramic capacitors are commonly used for filtering, coupling, and decoupling in various electronic circuits due to their compact size and wide range of capacitance values available.