Since the launch of "Google Trends" in 2006 it has become very famous.
Google trends reports the popularity of a search query in different countries and also the search volume bar. It is a really awesome tool for search engine marketers for gaining thorough insights for website optimization.
Recently google trends has added one more feather to its cap by announcing two new features. The features are numeric scale value for the search queries and CSV download facility.
Check this out at http://www.google.com/trends
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