What do you even consider advertising?
If I make let's say a children's toy, how am I supposed to let people know that this new type of toy even exists? That WHOLE process is advertising, no? Whether I give these toys away for free at a Santa Clause parade, pay department stores to put my toy in prominent shelves, or buy space on Cartoon Network.
How do you get even a single buyer without advertising?
Marketing. Advertising is only one of the strategies that get used to market a product.
I was referring to internet advertising, I should have made that more clear.
Only a very small part of advertising is actually product promotion. Coca-cola spends $4 billion a year on ads, do you think it's because otherwise no one would know that coke exists?
It's true that advertising is a great way to promote a product, but its far from the only way. For many years now I've done what I can to cut all advertising out of my life and yet I still buy lots of things, including things I've never seen a single ad for.