Capacitors are two-terminal electronic components used to store electrical energy. Consisting of two conductive plates separated by an insulating material known as dielectric material, capacitors play an essential part of many electronic circuits and devices - including smoothing power supplies, filtering signals, storing energy for later use, timing applications, etc. https://www.origin-ic.com/blog/What-is-a-Capacitor-and-What-Are-Its-Uses-in-Electronics/40880