Those dimes from the keyword ads pay for Google's project to put millions of library books online.
Google has recently integrated keyword ads into local and map searches.
Google is experimenting with other types of advertising, such as its AdSense program, which allows partner sites to host keyword ads and share revenue with Google.
Rather than running product listings in trade publications and newspapers, media insiders say tech companies prefer to buy keyword ads so they can send buyers straight to the gear they want.
It provides good ad targeting to advertisers, consumers often find keyword ads relevant to their interests, and (as I explain here) cost-per-click (CPC) keyword advertising nicely shares the risks of ad performance between advertisers and publishers.
Carriers could presumably share the revenues generated by Google's keyword-based ads.
They spent loads of money buying thousands of keyword combinations, hoping that ads for the sites would come up first when people used search engines to troll for dates.
Facebook, currently testing ads in its new Graph Search, is not offering keyword targeting yet.
While a keyword job search for "certified public accountant" might turn up ads seeking a small-business chief financial officer who is also a CPA, semantic-search software would intuit that the user is looking for accounting jobs and list only those openings.
Drawing on his experience brokering Web ads as a Wharton student, Miller drew up plans to market Catalyst via Web keyword searches.
The arbitrage scheme exploits that system using the basic buy low, sell high principle: A Web site arbitrageur uses a low-priced keyword to lure traffic and then redirects that traffic to another site that contains little content and is stacked with ads that earn a much higher price.
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