What are Employee Profile Categories?
A Profile Field is a data item related to an employee. For example Work Telephone Number is a Profile Field and it can contain data such as "01668 549 257".
You can find more information about how to add or edit an employee profile here
What are document categories?
Company documents are organised by Document Categories. Document Categories can be configured by users who have the Admin role from the CONFIGURATION sections of the application.
You can find more information on how to configure document categories here
What are company documents?
Company Documents refer to files, Links or Notes that are shared at the company level, these can also be restricted to specific Teams.
You can find more information about this here