Advertising is used to inform customers about new and existing products or services. It provides information on price, quality, name, what is offered, and where to obtain the product. The main goals of advertising are to increase sales, introduce new products, promote branded goods, improve company image, gain more retail outlets, and outcompete rivals. Common forms of advertising media include television, radio, newspapers, posters, cinema, neon signs, direct mail, and trade fairs. Choosing an advertising medium depends on factors like cost, target audience, geographical coverage, and number of people reached.