Facebook advertising is predicted to hit US$4 billion this year, which is twice the volume of 2010 spending according to eMarketer. While brands are rapidly investing in the space, they lack comparative experience to assess how well their campaigns are performing. Web trends have analyzed over eleven thousand campaigns to provide performance benchmarks brands can use to evaluate their own campaign performance. The Web trends database is a very large sample given the relatively young age of the Facebook ad network (see the stats at left). We focused on a few key metrics. From 2009 to 2010 the average CTR dropped while the costs increased. This is a typical pattern for display ad networks as the audience becomes more savvy and demand causes prices to rise.