We can also point some functions of advertising that will help us to understand what influence it has and what exactly it reflects.
By informing us about a new product or a new service advertising assists its' popularization, not only like "know more - buy more", here we can define two sides at the same time: increasing and demand, and supply. "Buy more - than produce more".
A kind of educational thing as well, sometimes leading to a comical situation, so now all the Russian men know that women shouldn't wear white and tight clothes on their 'critical days'. Let us now come back to the economics. A good ad not only helps to promote a product, but to sell it and this way the ad saves the business. Every time stimulating consumers' interest enough to be ended with a purchase, advertising helps to keep the producing company on the top and consequently saves its' working places.
As a result the more ads we see on TV or on the streets or wherever else, we realize that our market is improving and the level of life is rising in general.
Showing some kinds of lifestyle and making us wish more and more, advertising creates some images in our minds, some standards which not necessary reflect our present needs but gradually correct them and in the end lead us to their new forms.
And as a result here we'll have advertising as a compressed image of our contemporaneity. Ideally, accumulating feelings (don't forget that feelings is the main instrument and the main thing that advertising appeals to)