Location specific reinforcement cues are extremely helpful for improving position while heeling. Because where you deliver the treats affects where the dog wants to be, you can use that to your advantage for whatever tendencies your dog might have.
Reinforcement cues tell the dog that he or she is right. Location-specific reinforcement cues take that a step farther by delivering the reward in a specific way or area, therefore affecting how the dog might perform the behavior in future repetitions. Because dogs are very efficient creatures, they will quickly figure out how to most effectively get the treat. Therefore, they tend to gravitate towards where the treat comes from. If we can be strategic about reward placement, we can affect the tendencies of the dog over time.
Let's look at some common location-specific reward markers in heeling.