Most of us use reward markers to tell our dogs when they are right. Some people use clickers, others use verbal markers. When the dog is rewarded for something, he will be more likely to repeat that behavior. Location-specific reward markers take that a step farther by affecting how the dog might perform the behavior in future repetitions.
A location-specific reward marker is much like it sounds — it's a marker that tells the dog not only that he or she is right, but also provides information on where the reward will be delivered. By being strategic about reward placement, we can affect the tendencies of the dog over time.