a higher level person can use apprenticship on you which then makes your equivalent lvl to 1 below theirs, so if a lvl 80 apprentices you you become lvl '79' and as such have a lower aggro radius and more damage (still not as hard as a real lvl 79 of course though) and this allows you to go along with the lvl 80 to lvl 80areas and get the xp from killing stuff there