Clearing your device's memory can help improve your device's speed to make it go faster. Your device may become slow because it is low on memory.
1.
From the Home screen, tap Settings.
2.
Scroll to System.
3.
Tap System
4.
Tap Memory.
From this screen, you can view details about how your device memory is being used.
5.
Tap Memory used by apps.
6.
Select an app to view more information.
7.
You've completed the steps!
