What is Google Public DNS?

	What is Google Public DNS? Google Public DNS is a free, global Domain Name System (DNS) resolution service, that you can use as an alternative to your current DNS provider. To try it out: Configure your network settings to use the IP addresses 8.8.8.8 and 8.8.4.4 as your DNS servers or Read our configuration instructions. If you decide to try Google Public DNS, your client programs will perform all DNS lookups using Google Public DNS.
	Why does DNS matter? The DNS protocol is an important part of the web's infrastructure, serving as the Internet's phone book: every time you visit a website, your computer performs a DNS lookup. Complex pages often require multiple DNS lookups before they start loading, so your computer may be performing hundreds of lookups a day.
	Why should you try Google Public DNS? By using Google Public DNS you can: Speed up your browsing experience. Improve your security. Get the results you expect with absolutely no redirection.

Source:  http://code.google.com/speed/public-dns/