Sign into your Google account and visit http://www.Google.com/history
If your web history is enabled you will see a list of any searches you’ve made or sites you’ve visited recently.
Click the button “Remove All Web History” then “Ok”
Your history will be free and clear of any exploitation from Google. This will stop Google from any further tracking of your web history. If for any reason you change your mind at any point and want your history tracked go ahead and click that blue button “resume”.