Capacitance is a fundamental property in electrical engineering, measuring a device's ability to store electric charge. It is defined as the ratio of the electric charge on one conductor to the potential difference between the two conductors. The unit of capacitance is the farad (F). Capacitors, the primary devices exhibiting capacitance, are used in various applications, including energy storage, power conditioning, signal filtering, and noise reduction. Factors influencing capacitance include the surface area of the conductors, the distance between them, and the type of insulating material (dielectric) between them. Capacitance plays a crucial role in the design and performance of electronic circuits.