glenn - 2:42 pm on Jun 7, 2011 (gmt 0)

PostRank states that off-site engagement now accounts for 80% of the attention your content receives. Google wants to understand and provide the impact of social marketing, especially when a recent Forrester Research / GSI Commerce report said that less than 20% of visitors who "like" a company's Facebook page ever return to it? This seems more strategic than meets the eye to me.