Policy Objects (GPOs) are applied and managed within the Active Directory domain. This setup facilitates the efficient application of policies based on the nature of the objects. Policies generally apply to either computers or users.
What happens with the policies
Group Policy Objects (GPOs) in Active Directory allow administrators to manage and apply policies that affect computer settings or user settings.
By segregating computers and users into separate OUs, administrators can more easily apply specific policies to either computers or users without affecting the other group unnecessarily.