Commercial,the techniques and practices used to bring products, services, opinions, or causes to public notice for the purpose of persuading the public to respond in a certain way toward what is advertised.
In general, any openly sponsored offering of goods, services, or ideas through any medium of public communication. At its inception advertising was merely an announcement; for example, entrepreneurs in ancient Egypt used criers to announce ship and cargo arrivals.
Commercial advertisers often seek to generate increased consumption of their products or services through "Branding," which involves the repetition of an image or product name in an effort to associate certain qualities with the brand in the minds of consumers. Non-commercial advertisers who spend money to advertise items other than a consumer product or service include political parties, interest groups, religious organizations and governmental agencies. Nonprofit organizations may rely on free modes of persuasion, such as a public service announcement (PSA).
The major criticisms of advertising are that it creates false values and impels people to buy things they neither need nor want and that, in fact, may be actually harmful (such as cigarettes). In reply, its defenders say that advertising is meant to sell products, not create values; that it can create a new market for products that fill a genuine, though latent, need; and that it furthers product improvement through free competition.

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