I recently found an article at Ezine that looks at how valuable Google Trends can be for you and understanding your market online.
Some benefits of Google Trends are:
-Viewing and monitoring online search results
-Supporting information and current relative news trends that surround your web site’s focus
-Find out who is searching for your information and where they’re searching from
Read the article for a focused look at what you can do to leverage Google Trends as research.