Google, which runs the largest AD network on the Internet, is making millions of dollars a year by filling otherwise unused Web sites with ads.

Google运营着互联网上最大的广告网络，现在正通过给那些未使用的网站加载广告而每年获利数百万美元。

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Google is defending its business practices, saying it removes participating sites from its AD network if a trademark owner complains those sites are confusingly similar.

Google正为它的商业行为辩护，说一旦商标所有的公司投诉其他的网址与其有迷惑性相似，那么它将所参与的网站直接从其广告网络中移除。

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But Google did note that it had begun to use across its network the "DoubleClick ad-serving cookie," a computer code that allows the tracking of Web surfing.

但是Google没有提到它已经开始在其所有网络使用“DoubleClick广告服务cookie”，一段用来跟踪上网行为的电脑代码。

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The increase from 2010 to 2011 was primarily due to an increase in traffic, monetization improvements including new ad formats, global expansion, and added Google Network members, as well as an increase in the average cost-per-click paid by advertisers.

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Google Mobile Ads, Millennial Media and other mobile ad networks will grow faster than the iAd Network.

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"Google is helping to validate the space, " says Jameson Hsu, chief executive of in-game ad network Mochi Media.

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