Protection Against Editing
When you have created a Team Review Category, Topic or Document containing text, the item text is exposed to change by any user who has access to the Team Review. You can protect the item against unrestricted changes by setting a password on it. The password only refers to that item; to protect the text of Topics, Documents or Comments subordinate to the item, you set a password on each of them as well.
When the password is set, only those users who have the password can edit that item, and only when they specifically enter the password to unlock that item. Any other user of the Team Review can still view the protected item.
The password does not protect the item from operations on the item as a whole, including being deleted.