Advertising of course everywhere but it is not very good now.
In advertising, the most important thing is hits the audience that is interested in the product that is advertised. And if you show a school student porsche is just a waste of money because he is not going to buy it anyway.
Personalization of advertising is a very important component. On the one hand, users are afraid of losing their privacy and do not want to share their data with the service. on the other hand, they are forced to receive advertisements for products that they really do not need or are interested in.