I found this in a few different places around the 'net - hopefully it's helpful:

"Go" Places Quicker on the Internet

Many common Internet searches can be performed quickly using the "go" shortcut. For example, if you open Search in Internet Explorer and type go yellow pages, the page will jump to a form where you can lookup a business phone number. Likewise, typing go email automatically brings up a form for searching for a person's email.

You can even type go yellow pages Acme Corp to automatically search for the phone number of a company called Acme Corp. And you can type go amzn to look up the value of a stock quote (in this case Amazon's).