Google has started their own DNS service. This is the service that converts a domain name such as kirsch.com.mx into the actual Internet Protocol (IP) address such as 208.113.237.11. As you can imagine, this service is accessed almost every time you enter a URL. When you configure your computer to access the internet, you enter the DNS servers provided by your ISP. You can replace them with Google's (8.8.8.8 or 8.8.4.4). In theory, their service will be faster and more secure than what you are probably using now.