Ownership is a parameter which can be found on devices, tags and zones and represent an information about the account by which was corresponding object created. After the creation of one of the previously mentioned objects is ownership always set automatically. Ownership is set during manual object creation as well as during imports triggered directly in UI (scheduled imports create on device with Owner: None)
Information about ownership is visible and manageable only by Admin role. Please be aware, that ownership may have an influence on the accessibility to the various objects, because it have higher priority in comparison to access policies. That mean even if the access policies is set to ‘No object policies’ user can still see the objects of which is the owner.
If you would like to make sure that all existing objects for the specific user behave only based on Access policies, there is an option to remove the ownership from all the objects which belong to such an user. It can be found in User Management screen in “Show object ownership” (accessible only for Admin role).