Here is what Google does with your information:

http://donttrack.us/

http://dontbubble.us/

Here are some alternative search engines:

https://duckduckgo.com/

https://ixquick.com

They cannot however work as well as Google, so if you want to use Google without being tracked use Firefox and download this add-on:

https://addons.mozilla.org/en-US/firefox/addon/googlesharing/

This add-on will show Google random IP adresses so they cannot find out who did the search.

You can enable or disable the add-on on the bottom right of your browser.