Product placement plays a big role in the media industry. The only way it is effective is if you are undecided about a certain product. No matter how many times I see my favorite show drink pepsi, I am still going to prefer coke. I think the same holds true for anyone, because most people are smart enough not to be completely persuaded by the shows the watch. I think the effectiveness comes from the undecided group of people. If someone had never drank a coke or a pepsi, and then saw somebody drinking a pepsi on their favorite TV show, they might go try it. This is still limited persuasion because most people also know that companies pay to get their products on the show, and it doesn't mean that that character likes that product, so product placement, along with all other advertising, has lost its effectiveness because we are constantly bombarded by adds. Adds can draw in customers that don't know about a product, but a product has to be good for it to continue to be successful.