Google stores all your search history. If you are worried that your search and other stats about images, news or videos that you have been looking at Google are stored at their servers then there is a simple way from Google itself to remove them.
Google stores all the searches that you have made till date so that it can serve you better. Even the results that you click on from the searches are stored so that Google may know the likings of the users. Google uses this information to decide the ads that it displays under sponsors listing and also to suggest you the relevant words. However most of us do not like Google storing our personal data. People think that Google knows much about us than needed. Our likings, our behaviour, our mails, our online life is all in hands of Google. Nevertheless, the search giant itself provides measures to delete all your search history. To remove all your searches till date follow these steps:
1) Go to http://www.google.com/history/
2) Click on Remove all web history present at top center of the page.
3) Confirm the deletion by clicking on Clear History button.
Good News is that Google will also stop recording your searches from now on. If you want Google to record your searches then you can simply start it again by clicking on Resume link.