If you'd like to prevent Google from combining this sensitive data with the information it has collected from your YouTube, Google+, Gmail and other Google accounts, you can remove your Web History and stop it from being recorded.
Firstly sign into your Google account then type the following “https://www.google.com/history” into your browser.
If your Web History is enabled, you'll see a list of recent searches and sites visited. Click the “Remove all Web History” button at the top of the page and a subsequent OK button to clear your Web History.
This action also pauses the Web History feature so that it will no longer track your Web searches and whereabouts. If you'd like to fire it back it, simply click the “Resume button”.