This option enables you to have a log created for all access activities regarding the archive. You find more information on this in 25.10.1.
This option results in the ArchivistaBox working a bit more slowly. Accordingly, turn it on only if you attach importance to having an access log. What is more, you should be aware that the option cannot be turned off so easily once it is turned on, the reason being that otherwise an administrator could hide his or her own accessing the database.