This report lists the search engine keywords and the domain name of the site that referred
the most recent 4,000 visitors to your site.
This allows you to see the keywords people are using to find the
site. If the keyword field is blank, that means a search engine didn't refer the visitor to your site.
If the domain name is also blank, it could mean the visitor typed the URL directly in the address of
their browser or the referring information isn't available.