n used in conjunction with outdoor billboards(广告牌) and the Internet to reach even more customers than television. Advertisers are likely to use radio because it is a less expensive medium than television. Which means advertisers can afford to repeat their ads often. Internet companies are also turning to radio advertising. Radio provides a way for advertisers to communicate with audience members at all times or the day. Consumers listen to radio on their way to school or work, at work, on the way home, and in the evening hours.

Two major changes—satellite and Internet radio—will force radio advertisers to adapt their methods. Both of these radio forms allow listeners to tune in stations that are more distant than the local stations they could receive in the past. As a result, radio will increasingly attract target audiences who live many miles apart.

                                              Magazines

Newsweeklies, women’s titles, and business magazines have all seen increases in advertising because they attract the high-end market, Magazines are popular with advertisers because of the narrow market that they deliver. A broadcast medium such as network television attracts all types of audience members, but magazine audiences are more homogeneous. If you read Sports Illustrated, for example, you have much in common with the magazine’s other readers. Advertisers see magazines as an efficient way of reaching target audience members.

Advertisers using the print media—magazines and newspapers—will need to adapt to two main changes. First, the Internet will bring larger audiences to local newspapers. These audiences will be more diverse and geographically dispersed (分散) than in the past. Second, advertisers will have to understand h