Power management settings are designed to help you save energy and prolong the life of your computer by turning off some of its components when they are not needed. To use power management settings on your computer, start by accessing the Settings or Control Panel app on your device. From there, look for an option to adjust power settings or plans and make necessary changes to optimize your computer's performance while minimizing energy usage. Check the documentation or online support resources provided by your computer's manufacturer for more detailed instructions on using power management settings on your specific device model.