> an ad might make me aware that something existed and entice me to investigate further. I believe it's one of points of ads: when choosing what product to buy

> an ad might make me aware that something existed and entice me to investigate further. I believe it's one of points of ads: when choosing what product to buy, you're likely to choose between options A and B, which you've heard about (either from ads, or friends), and not option C, which you've never heard about.