If you are a library manager and you want certain people in your organization to have access to the Administration site, but not to patron data, you can grant them a librarian access. A librarian will have access to the same content management and curation features as a manager, but will not be able to modify the various settings and configurations of your library (which can be found in the Organization section).
To create or modify a librarian access, see How do I add, change or delete a manager or librarian account?
The box Give this account access to patrons’ personal data is checked by default. You can uncheck it. This account will not be able to view the Search tab in the Patrons section. It will not be possible to see the patron's information linked to the loan and hold information in the Administration site. A manager can also check or uncheck this box for other managers, but not for themself.