Webtrends analyzed over 11,000 Facebook ad campaigns to provide benchmarks on key metrics like click-through rate, cost per click, cost per thousand impressions, and cost per fan. Their analysis found that click-through rates have decreased from 2009 to 2010 while costs have increased. Certain factors like age, gender, education level, and using friend-of-fan targeting can impact ad performance. The report provides distribution curves to help marketers evaluate how their campaign metrics compare.