How to Delete Google's Input History.

If you have a Google.com user account or GMail email address, Google keeps track of every search you input into its search engine as long as you're logged in. Though this can be helpful if you ever need to quickly refer back to something, it could also lead to privacy concerns if you leave your account logged in on a public computer. Go through the "Settings" page on your Google account to delete your user name's input history.

This article will help you to delete Google's search history.