sorry guys, i dont have time now.
I have many business papers that i can upload later.

Firms in the advertising and public relations services industry prepare advertisements for other companies and organizations and design campaigns to promote the interests and image of their clients. This industry also includes media representatives—firms that sell advertising space for publications, radio, television, and the Internet; display advertisers—businesses engaged in creating and designing public display ads for use in shopping malls, on billboards, or in similar media; and direct mail advertisers. A firm that purchases advertising time (or space) from media outlets, thereafter reselling it to advertising agencies or individual companies directly, is considered a media buying agency. Divisions of companies that produce and place their own advertising are not considered part of this industry.

Industry organization. In 2006, there were about 48,000 advertising and public relations services establishments in the United States. About 4 out of 10 write copy and prepare artwork, graphics, and other creative work, and then place the resulting ads on television, radio, or the Internet or in periodicals, newspapers, or other advertising media. Within the industry, only these full-service establishments are known as advertising agencies. About 1 in 6 were public relations firms. Many of the largest agencies are international, with a substantial proportion of their revenue coming from abroad.

Most advertising firms specialize in a particular market niche. Some companies produce and solicit outdoor advertising, such as billboards and electric displays. Others place ads in buses, subways, taxis, airports, and bus terminals. A small number of firms produce aerial advertising, while others distribute circulars, handbills, and free