I think the fact that advertising persists in such widespread forms is pretty good proof of its efficacy. Study after study shows that even if you think you're

I think the fact that advertising persists in such widespread forms is pretty good proof of its efficacy. Study after study shows that even if you think you're immune from advertising you still gain a positive outlook on a brand just from familiarity/repetition alone, nevermind if you agree with the content of the advertisement.