Devices pile up temporary files, data or cookies over time and it might affect your device performances. It can result in apps not working as they should, or it can globally slow down responsiveness. Restarting your phone regularly can also help improve performance by closing all of the open background applications that may be slowing down performance.
We recommend restarting your device on a weekly basis. If you're having issues with your device, restart it, this may help solve the issue. Go to this page for iOS devices and to this page for Android.