Teenagers and young adults are redefining societal norms, and with that they are changing the way marketers go about doing their jobs. After reading Heidi Cohen’s article “5 things marketers can learn from high school students”, I agreed with some of her comments but also disagreed with one of her thoughts in particular. For example, Heidi mentions that cable television has become an obsolete method of marketing. I have to disagree with Heidi on this one, most households nowadays have cable television and teenagers still watch television shows, maybe not to the degree they did 10 years ago but it is still a viable medium for advertisements. Products like Netflix and YouTube have taken over a large chunk of cable television but it still plays a large role in the lives of teenagers and young adults, pulling from my own experience. For the most part, Heidi Cohen does portray an accurate representation of the changing demographic of young adults. From my own experiences it is easy to see the shift from basically just cable television advertisements to now Facebook, YouTube, Netflix, Instagram, Vine, SnapChat, etc. Advertisements have evolved with the changes in technology but an important fact that Heidi pointed out was that many marketing agencies use the above mentioned social media devices to collect data rather than to actually advertise directly to the consumer. In my own experience I find that commercials I see on television have a greater effect on me to buy that good, rather than seeing that same advertisement on my mobile device. I am not sure the psychological aspect to it, but I almost correlate advertisements on television as more legitimate than ads on my phone. As a result marketers have picked up on this trend and more or less just collect data from those social media sites. Even though the world is changing to a more digital age some of the classics still remain in the marketing world. 
Heidi’s Blog
http://heidicohen.com/5-things-marketers-can-learn-high-school-students/