Easy, look at a couple of comparison websites whenever you need a specific product, and compare them to each other.

You’ll get a somewhat unbiased idea of what the best product is to your specifications, and they are full of brands you never heard of.

I never said that I shouldn’t hear about it, only it shouldn’t have advertising. So recommendations by friends are helpful, so is personal experience in a store or review by trusted source. And for example, all of FOSS software doesn’t have ads for them and often is better than paid counterparts.

You don’t really see advertisements for things like mega yachts or helicopters. Or private jets.

Most things that you’ll have to talk to a dealer or rep for, you don’t actually see ads. Except maybe cars.