After some time Google said it would change privacy policies on data storage and use access history of users. U.S. giant said that in this way users search results (and others) will be more accurate and detailed due to the combination of personal data collected from them, but mainly because users access history storage. In this procedure much disputed, online advertisers will be able to deliver targeted advertising individual user profile, leading to a much improved efficiency.
One way to limit users to collect information 1 March, is to delete search history GoogleSo Google will collect information on the history only after that date. The steps required for this change are presented below.
Access your account Google and click on the user link in the top right and select "Account Settings" according to the screenshot below.
Stage 2 to:
In the new open page, access the services option and open “View, enable or disable web history"
Stage 3 to:
In the new window you have several options. You can choose Selective deletion of history last visits clicking on remove or Remove all Web History you can delete the entire history, having the option to reactivate this option if you think it is useful.
After these changes Google will not be able to access your past history and record access search only after the entry into force of this controversial changes to Google's rules. Google has thought about the users who do not have Google account, they are monitored on Google search based on the IP that is accessing and promises that the data collected will be deleted after a year and a half.
The move to Google was largely generated by the direct competitor Facebook which by the way has built famous and massive social network, gathered personal information of users, has created a real advantage in creating customer-targeted advertising products.
You can browse all the documentation on this change on http://www.google.com/policies/terms/