Online advertising revenue in the U.S. topped $20 billion in the first half of this year, an increase of 18% from the same period a year earlier, according to a new report from the Interactive Advertising Bureau (IAB).
Some of that growth was due to increases in display and search spending, but the biggest chunk appears to have come from increases in mobile ad spending. IAB found that mobile revenue more than doubled from $1.2 billion in the first six months of last year to $3 billion this year, an increase of 145%.
See also: Social Advertising Tips for Your Business
“Mobile advertising’s breakneck growth is evidence that marketers are recognizing the tremendous power of smaller screens," Randall Rothenberg, president and CEO of IAB, said in a statement.

IAB did not project full-year revenue estimates, but noted that Internet ad revenues are now on pace to exceed last year's record total of $36.6 billion.
Image: iStockphoto, Tomacco