This is to speed your internet up. I have no idea how it works but it really does work! http://webaccelerator.google.com/
This may sound dumb but what is a proxy? I remember years ago when I was doing autosurfs one wouldnt accept me because they said my IP was proxy and I still dont know what it meant.
Proxy means that you are using a third party to do something. For internet, it means that a 3rd party (server) will request the webpage on your behalf and transfer the requested page back to you. Use of proxy is to bypast firewall, hide your ip and etc.