Google has made signifcant changes to terms & conditions policy for adsense publishers, and One of the major changes requires now all Adsense Publishers to have a specific Privacy Policy on their website giving information to site visitor that the ad networks or Google would be placing cookies on visitor’s machine and collecting certain information here is the snippet from Google’s updated terms & conditions., However what made me curious that i have not noticed many people placing this information already on their sites who are Adsense publishers anyway here it is
You must have and abide by an appropriate privacy policy that clearly discloses that third parties may be placing and reading cookies on your users’ browser, or using web beacons to collect information, in the course of ads being served on your website. Your privacy policy should also include information about user options for cookie management.