The price of cost per click adverts on Facebook almost doubled between the second quarter of 2010 and the same quarter in 2011, while cost per thousand impressions increased by 45%, according to marketing agency TBG Digital.

Growth of brand advertising campaigns grew by 104% year on year as companies look to increase their amount of Facebook fans. The use of Sponsored Stories ads proved to be one of the most effective forms of improving campaign performance, decreasing cost per acquisition by 32%.

More at Marketing Week ...