Trackers are travelling warrior-druids, usually solitary and aloof. They are often the protectors of those far from home, travellers who are lost, or even bounty hunters who track criminals in order to bring them to justice or just to make a buck. They are sometimes used as scouts for armies, and sometimes make up their own force in times of war.
Trackers don’t have the pure combat effectiveness of warriors, and lack the total control of druidic magic that druids possess, but the combination of those disciplines makes them a class to be reckoned with.