Google recently launched the Google Public DNS, aimed at increasing the speed of Internet name resolution.
DNS (Domain Name System) resolution is responsible for converting a website’s name into an IP address (www.google.com -> 64.233.163.163). This service is used whenever your computer needs an Internet address. Every time a new name is converted into an IP address, the result of this conversion is stored in a quick access table on your computer to speed up future accesses, or simply put, a cache.