If your talking about the "Freewill Plug in", I'm pretty sure it means how well HAL with 'Obey' you, like a pet or human...
Just try it out and see what happens, you can always turn if off or change the "Obedience Level" to something else...
Make sure you click on 'APPLY CHANGES' after you check it, then 'OKAY'. If you decide you don't like it, click on 'APPLY' after you 'uncheck' it, then 'OKAY'...