http://www.brandweek.com/bw/content_display/news-and-features/digital/e3i9e2284979c0b8c78ba188179079a495b
According to Forrester data, 24% of advertisers used behavioral targeting in 2008. Last year it was only 16%; the year before, only 13%. And BT's popularity is only going to grow, Riley said. "Almost half of advertisers say, 'Even if I didn't use behavioral last year, I definitely want to this coming year,' and this big jump between 'not currently using' and 'plan to use' indicates a lot of excitement around the topic," she said.