Such as?
I can't recall myself purchasing anything [just] because of an ad, or knowing anyone else who did, or even seeing an ad for something I was interested in.
Everything that I've spent money on, has been discovered through manual search, word of mouth (on online forums), voluntarily subscribed newsletters/feeds (like a favorite developer announcing a new game or app) or random recommendations algorithms (like these clips of Mortal Engines and Ultimate Chicken Horse that I just saw on YouTube, or featured spots on the App Store, Steam, iTunes etc.) which I guess may count as a form of advertisement but they show me what a product is actually like.