The story, "Internet ad revenue hit $31.7 billion in 2011, topping previous record," posted to the wire on Thursday, incorrectly identified Sherrill Mane's title. She is the senior vice president of research, analytics and measurement at the Interactive Advertising Bureau.

The story has been corrected on the wire. The fourth paragraph now reads as follows:

The industry continues to grow so rapidly because advertisers still have a way to go before they match consumers' embrace of Internet platforms, explained Sherrill Mane, the senior vice president of research, analytics and measurement at IAB.