Advertising affect/influence media content?

"If you're like most people, you think that advertising has no influence on you. This is what advertisers want you to believe. But, if that were true, why would they be willing to spend over $200 billion a year pn advertising? Why would they be willing to spend over $250,000 to produce an average commercial and another $250,000 to air it?" this is the first few sentences in Jean Kilbourne's book, "Cant Buy my Love: How Advertising Changes the Way We Think and Feel". Many advertisers use content that will, as they think acceptable, to luer in more customers and more business. For example, Kilbourne talks about an ad for an advertising agency, "If you have high ambitions, hire us, he did", with a picture of Geroge W. Bush, after the reelection in the office as governor of texas. The ad goes onto say, "If we can create advertising that persuades Hispanic Democrats to vote Republican, we can get them to buy your product." This ad obviously was to be appealing to the Democrat farmers in the texas area, and pinpointing the Hispanic race as the leading purchaser of whatever you would like to sell, maybe more appealing signs in spanish might be one way of advertsing for their clients.