Google is trying to clean up its search results by cracking down on dubious Web sites that contain little content but lots of ads.The search giant has notified a number of Web publishers in the last few days that they will be dropped from its popular "AdSense" program starting June 1.
The cut-off notices jolted the online ad world, where hundreds of thousands of people make money in exchange for allowing Google to place ads on their Web sites.
Google's AdSense software has made it easy for advertisers to piggyback on any Web site - no matter how obscure - that attracts an audience.
For example, on a travel Web site, Google's AdSense will automatically serve up relevant travel-related ads on that site. Web site publishers then get paid each time a visitor clicks on one of the ads supplied by Google.
The easy money has led to a rise in "made-for-AdSense" Web pages that critics say clutter up the Internet and divert online searches. These content-free sites, which often are nothing more than links to other sites and a bunch of Google ads, exist solely to exploit AdSense.
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