Originally Posted by Hue G. Pness

Because music takes advantage of affective appeal. Often the music in a commercial is designed to appeal to the productss target demographic. For example pick up trucks often make use of a country music theme. Adding an auditory experince to the add increases the likelyhood of the viewer to maintain the message of the commericial. Additionally long term memory is often encoded sematically as well as visually and in an auditory fashion increasing the likelyhood the target audience will remember the product.