Using them to Properly Reward and CORRECT
Communicating with your dog is a simple thing, but if it’s not understood, it can lead to great confusion.
Using marker words will make the process simple because this allows you a clear communication with your dog. You will use positive markers as well as negative markers.
See: online dog training
Using a marker shows the dog that the behavior he or she did is what you wanted (or also not what you wanted in a negative situation). You will have a clearer communication with your dog by taking out the over-explaining that people often do when training their dogs.