More than 26 percent growth to about $10 billion (7.09 billion EUR) was achieved by U.S. Internet advertising revenues in the first six months of the year.
Keyword ads - such as those displayed alongside search results at Google Inc. and other search engines - remain the most lucrative, accounting for about 40 percent of online revenues.
Display ads made up 21 percent of total revenue and classifieds had 17 percent. Other formats include video, e-mail and sponsorship ads.
The figures come from a PricewaterhouseCoopers LLP study conducted quarterly by the Interactive Advertising Bureau, an industry trade group.
Despite the growth, online ads remain a small part of overall advertising spending, although the Internet is widely expect to command more of the marketing dollars now going to television, print and other traditional media.
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