Earlier quoted context omitted.
Informing potential customers of products that might be useful to them. Let's say you are the inventor of the chainsaw, you need to tell lumberjacks that chainsaws exist, that's advertising. Otherwise you won't sell any and your invention will be lost, while lumberjacks will continue struggling with inefficient tools.
> Informing potential customers of products that might be useful to them. Isn't there an insurmountable conflict of interest when the person doing the informing is also the person who directly benefits from the product being 'useful' to as many people as possible?
You are probably not going to find a job if you don't tell anyone you need a job, job hunting is also advertising.