The clicker is a device that makes a clicking sound. DOG CLICKER-TRAINING TOOL is use as a way of communicating with animals and most commonly dogs. Eventually, the animal learns to repeat. The behavior for a treat is a scientific way to make pet training easy.
Clicker training or mark and reward is a form of positive reinforcement dog training. The clicker or marker communicates the exact moment. Your dog does what you want. The timing of the click is essential and every click must be followed by a reward.