Definition: Google Trends for Websites is a feature of Google Trends. It is a Google Labs tool that lets you compare the relative popularity of up to five websites.
Google has excluded all Google domains from the database. Google Trends for Websites only gives information on relatively popular websites. Those sites must be in Google's main index, and Google doesn't break down the information into subdomains.
Google Trends for Websites is found on the Web at trends.google.com/websites.
