Ad targeting in Gmail is fully automated, and no humans read your email in order to target advertisements or related information. This type of automated scanning is how many email services, not just Gmail, provide features like spam filtering and spell checking. Ads are selected for relevance and served by Google computers using the same contextual advertising technology that powers Google's AdSense program.Facebook has been constantly attacked by malwares, spams and their threats are growing everyday. Unless Facebook really correct this issue , I believe a new product "TightBook" with water tight privacy features may replace "Facebook". Already "Path" with its tighter policy controls and limited number of friends is proving a good Facebook rival. Maybe its time for Google to buy Path and develop this as weapon against Facebook. In Summary here is how I think, Google can win over Facebook.