Phase control is a technique used in electronics to manage the timing of electrical signals. It allows for the adjustment of the phase angle of a waveform, which can help in controlling the power delivered to a load. This is particularly useful in applications like light dimmers and motor speed controllers, where precise control over energy consumption is needed. In phase control, devices such as thyristors or triacs are often employed to turn the current on and off at specific points in the waveform. By delaying the turn-on point, the average power delivered to the load can be reduced, leading to energy savings and improved efficiency in various electrical systems.