Advertising: How much ethical?

Advertising is used to convey availability of a "product" (which can be a physical product, a service, or an idea) and to provide information regarding the product. This can stimulate demand for the product, one of the main objectives of advertising. More specifically, there are three generic objectives of advertisements: communicate information about a particular product, service, or brand (including announcing the existence of the product, where to purchase it, and how to use it), persuade people to buy the product, and keep the organization in the public eye (called institutional advertising).