Skin depth points out the increase of the resistive element of a conductor line. This, in turn, causes a voltage drop, with a decrease in skin depth. Thus, results in less power handling capacity. Thereby, it conveys how much material (inner) is not required while modeling a transmission line, for say. This will help in deciding the design strategies in nearby areas as well to avoid the discharge and sparking effects. So mainly, skin depth depends on the frequency of operation as well as the resistivity of the material. It is inversely proportional to the frequency whereas, directly proportional to the resistivity.