Android Device Manager; Backup And Reset - Huawei NEXUS 6P Quick Start Manual

and your device from harm. By default, your device doesn't allow the
installation of apps from sources other than Google Play.
If you choose to allow the installation of apps from other sources, you're
more likely to end up with harmful apps on your device.
The Verify Apps feature protects you by continually checking for apps
that may harm your device, steal your personal information, or perform
other malicious actions – no matter where they come from. Regular
updates to your Android software help ensure that your device can
identify and warn you about apps that are known to be dangerous. Be
sure to accept such updates whenever you're notified of them.
For more information or to change the default behavior, visit Protect
against harmful apps.

Android Device Manager

If you lose your phone or tablet, the Android Device Manager can help
you find its approximate location, make it ring, lock it, or erase its data.
These options are turned on by default. To view or change them, open
Settings > Personal > Google > Security.
If you lose your device, go to Android Device Manager and follow the
instructions.
Backup & reset
If you want to change the Google Account that your device backs up to,
you can change that in Settings > Personal > Backup & reset.
If you need to reinstall an app, your device can automatically restore
your backed up settings and data from Google Drive. You can choose
this option when you first set up your device, and turn it on or off from
Settings > Personal > Backup & reset > Automatic restore.