Power Factor Correction (PFC) is a technique used to improve the efficiency of electrical systems. It addresses the issue of power factor, which is a measure of how effectively electrical power is being converted into useful work output. A low power factor indicates that more power is being drawn from the source than is necessary, leading to wasted energy and higher electricity costs. By using devices such as capacitors or inductors, PFC helps align the voltage and current waveforms in an electrical system. This alignment reduces energy losses and can lead to lower utility bills, improved system reliability, and compliance with regulations set by utility companies regarding power quality.