Policies (Computer Configuration)
From GPO.wiki
The Policies section contains Group Policies which allows administrators to set or restrict settings for the client. As these settings are stored in a different part of the registry, you can apply and misapply a policy without loosing the original setting.
Many settings also disable the according dialog. For example setting a background image is also disabling the file chooser to set another image.
The policies are divided into three sections: