The visibility of the fields at the Employee Level dictates how a field behaves for users. It's best practice to configure this level as either Hidden or Read-only. Implementing this strategy empowers you to maintain control of the inputs on employee profiles.
If a field is set to Hidden, it becomes invisible during data entry but continues to hold and provide data for reporting purposes. On the other hand, the Read-only option allows users to view the field but not modify it. If you set a field to Hidden, it retains data for reports but does not display for data entry. If the first linked list field is set to Hidden, all the related field lists are read-only (grayed out) for that application level, regardless of their settings.