This command is used to restart the adb with root permissions
Restart adb with root permission
It is a command that that restarts the adbd along with root permissions
If you get an error saying "root access is disabled by system settings", then you might need to enable adb root in developer settings menu. The general steps to enable it is Settings>About Phone and tab the Build Number seven times to unlock Developer Options. Now go to Developer Options in System Settings and activate the root option (ADB only or Apps and ADB). After this, adb will restart and you will be able to use root from the cmd line.
You can use adb root command if your device has root access
No! You just need to type the command adb root without including or replacing anything in this command.