Dynamic Voltage and Frequency Scaling (DVFS) is a power management technique used in computer systems to adjust the voltage and frequency of a processor based on its workload. By lowering these parameters during less demanding tasks, DVFS helps reduce power consumption and heat generation, which can extend the lifespan of hardware. This method is commonly implemented in mobile devices, laptops, and servers to optimize performance while conserving energy. When the system requires more processing power, DVFS can increase the voltage and frequency, allowing the processor to handle intensive tasks efficiently.