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That puts Google at a disadvantage. Unless it can get similar data through a social service of its own, Google is left with a formula that sorts through the pattern of Web links and other computer data to determine where a site should rank in its recommendation. The system has become increasingly vulnerable to manipulation by websites looking to rank higher than their rivals. As a result, Google search results might not be as useful as recommendations drawn from an analysis of what they have already signaled that they like by pressing a Facebook button. There's another key way that social data can help Google. On Facebook, companies can target their advertising with razor-sharp precision given all sorts of information that people willingly share, such as a preference for Coke over Pepsi or whether they've ever been married. For example, they can show a particular Cheetos ad only to single men aged 17 to 41 who live in New York, are Yankee fans and enjoy the "World of Warcraft" video game. "That's Facebook's biggest calling card to marketers," said Debra Aho Williamson, principal analyst with eMarketer. Advertisers are typically willing to pay more for such targeting because they'd be pitching to consumers most likely to buy. Google does a good job already of targeting ads based on what people search for, write about in emails and watch on YouTube. Social data could help Google do even better. Danny Sullivan, who follows Google closely as editor-in-chief of the website Search Engine Land, said that if Google Plus succeeds, Google would get "a good insurance policy" amid the rise of social networks. The need for it became apparent when Google's deal to include Twitter updates in its search results expired recently, Sullivan said. Google has temporarily shut down its "RealTime" search feature, though it told users to stay tuned while it explores how Google Plus will figure into it. That said, Google Plus doesn't necessarily need to be a Facebook clone. "Google needs to have a social strategy that is relevant to Google and the way people use Google applications," said Susan Etlinger, analyst at Altimeter Group. "That's very different from how people use Facebook." Facebook is, for now, an online hangout above all. People go there to scan status updates, chat with a friend or look at the latest photos, without necessarily having something specific in mind. With Google, people usually have an objective, whether that's searching for a hair stylist or sending an email about an upcoming party. Google's task is to make its existing products social as "social" becomes the norm for online activity, she said. "Eventually everything is going to be a social network," Etlinger said. "Social capabilities will be in everything on the Web."
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