Classical conditioning plays an important role in advertising. It involves associating a previously neutral stimulus (the ad) with an unconditioned stimulus (the product) that naturally elicits a response. Repetition of ads strengthens this association and prevents advertising wearout. Stimulus generalization allows consumers to associate related products and extensions with the same brand attributes. Advertisers leverage this through line extensions, family branding, and licensing. Stimulus discrimination allows consumers to choose between similar products based on their individual needs and preferences.