Marketers served 115.2 billion display impressions online last month--down about 7 percent from the 124.5 billion served in October, according to new data from Nielsen//NetRatings' AdRelevance. Still,
more impressions were served in November than every other month from March through September. E-mail sites accounted for the largest proportion--26.7 percent--of impressions, up from 20.8 percent last
November. Portals and search engines garnered 12.3 percent of ad impressions--down slightly from 15.5 percent last year--while general community sites took in 11.5 percent of impressions, up from just
4.8 percent in November of 2004. -- Wendy Davis