As a power-saving feature, power management can effectively control the power usage of various system components. When the system is idle, power management can reduce power usage by switching the system to low-energy states, such as sleep or hibernation. Switching your system to sleep or hibernation has several benefits, such as extended mobile device battery life, reduced heat consumption, reduced power usage and reduced noise.

Sleep:

In sleep state , the computer stops and the current state is stored in memory. The memory remains powered, while power to the hard drive is cut off. At the same time, while in sleep mode, the system's LED power light will change color or start flashing. While saving power, sleep mode also allows the system to quickly return to a fully powered-on state when you need to continue using it. However, data loss may occur if system power is cut off, so sleep mode is suitable for short periods of system inactivity.

Hibernation:

When the computer enters hibernation, it will save the current state to the hard disk and shut down the machine. When restarting, the system loads data from the hard disk, which is slower than the recovery time from sleep mode, but faster than restarting after a complete shutdown. If the system power is cut off, data will not be lost. Therefore, especially for mobile devices that run on battery during long system idle times, hibernation is a safer choice.