Why advertise are given?

Advertising has become a very specialized activity in modern times. In the business world of today supply is usually greater than demand. There is great competition Between different manufacturer advertises in the Newspapers and on posters. He sometimes pays for songs about his product in commercial radio programme. He employs attractive sales- girls to distribution samoles of it. He organizes completions, with prize for the winne. He often advertises on the screens of local cinemas. Most important of all,in countries that have television he had advertisements put into programmes that will accept them..........!