Conventional display ads are simply wasteful, says Jakob Nielsen of Group M, a large media buyer. Say a company wants to reach y

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问题    Conventional display ads are simply wasteful, says Jakob Nielsen of Group M, a large media buyer. Say a company wants to reach young men. It might buy ads on the sports section of a large portal such as Yahoo! But it will also be paying for the women who visit that page.
   Real-time bidding helps solve these problems by allowing marketers to buy known audiences. Click to open a web page and an automated auction begins. Firms bid to serve an advertisement, taking into account where it will appear and what they know about the presumed viewer from digital traces he has unconsciously left around the web. The winner serves the advertisement, often customizing it—so you may see more ads for convertible cars on a sunny day. The whole process generally takes some 150 milliseconds, or less than half the blink of an eye.
   But the growth of real-time bidding may prove highly disruptive. An auction system allows everyone to discover the real value of online ads. It also provides a wealth of data to advertisers about the behaviour of their target audiences. These days some media firms can charge relatively high rates for online ads on the grounds that their websites are frequented by the young or the affluent. Increasingly, advertisers are learning how to reach the same people on other websites, for less money.
   As Mr Nielsen of Group M puts it, the conversation between buyers and sellers of advertising is becoming unbalanced, with the former often armed with more data than the latter. Some media firms have responded by selling fewer ads through middlemen, in real time or otherwise. The obvious way to do this is to force people to register for websites, or even to pay (which reveals their credit-card details and where they live). In short, content is no longer king on-line. Information about users is what really matters.
   Regulators may yet hinder the growth of real-time bidding. Targeted advertising is drawing anxious scrutiny from congressmen and journalists. A Wall Street Journal investigation into online tracking last year found that its own website dropped 60 digital markers onto a visiting computer. Before May 25th European governments must incorporate a privacy directive that is expected to make it easier for users to opt out of targeted ads. A confusing patchwork of laws may result.
   But few expect radical change. So quickly has targeted advertising advanced that a ban would severely disrupt the internet economy. Web users are more likely to see little icons identifying targeted ads. If the past is any guide, people will learn to ignore them, too.

It’s implied in Paragraph 2 that real-time bidding features_____.

选项 A、online tracking services
B、random competition
C、precision targeting
D、strong user traffic

答案C

解析 细节题。第二段主体讲述了实时竞价的特征,媒体公司根据网络用户的信息决定广告出现在哪里;媒体公司还能根据客户的差异、天气的变化调整广告,实现个性化广告服务。由此可见,实时竞价能够做到精准定位,C项符合文意。
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