As one who has worked in marketing and advertising for 40 years, I can assure you that people are far less immune to advertising than they admit. I myself, who wrote that stuff for decades, am an extremely susceptible (bordering on gullible) consumer. Look around your house, especially your kitchen and bathroom, and think about where you first learned about the products you bought—and why you continue to purchase “New, Improved” versions of many of them.