european law demands by the 1st of september to contain a user displayed warning when a site uses cookies, we do use cookies, to deliver nasty google ads and track usage information
a side not, beside the general information, the most effective way to relieve you from beeing tracked is to deactivate 3rd party cookies in your browser, 3rd party cookies are used e.g. when you visit a shop site and watch a product, and deliver through that cookie information ads about that product you just watched, read here for deactivating them:
http://www.cnet.com/how-to/disable-third-party-cookies-in-ie-firefox-and-google-chrome/