Ads are not designed to get you to buy stuff. Ads are designed to familiarize you with a product. So when you plan a party and have to think what drinks to buy,

Ads are not designed to get you to buy stuff. Ads are designed to familiarize you with a product. So when you plan a party and have to think what drinks to buy, you already know Coca Cola is a drink that exists. Maybe you buy it, maybe you don't. It doesn't matter. And if you go to a party, you also know that Coca Cola is a drink you can expect to get. That's what ads are for. To get everyone to know that they live in a reality where your product exists.