[zm262]

Ads are somewhat like propaganda. There's no proving it will work or not in short terms, but nobody can deny that persistent propaganda has a long-term effect on the whole population. You have think about a kid/youth who listens to some propaganda for years when growing up. If say you show an ad for a new Apple product. A small part of it is to inform consumers about it, the longer larger part is to enforce the Apple brand which has been happening over many years. You can't say well it is not quite working so let's stop doing Ads.