If you constantly have dozens of apps open on your phone, the new Android will look at which of your open apps you use the least and close them after a period of inactivity. (tomsguide.com)
Android Oreo benefits Background limits: Android Oreo helps minimize background activity in the apps you use least, providing better device performance. (verizonwireless.com)
The Nokia 8 should also now power up faster and its battery might last longer, thanks to a feature that limits the background activity of the apps you use least. (techradar.com)