Google

The frequency of use of many search terms has reached such a volume that they may indicate broader economic, social and health trends.Data about the frequency of use of search terms on Google (available through Google Adwords, Google Trends, and Google Insights for Search) have been shown to correlate with flu outbreaks and unemployment levels and provide the information faster than traditional reporting methods and government surveys.
Google has every reason to do whatever it takes to preserve its algorithm’s long-standing reputation for excellence. If consumers start to regard it as anything less than good, it won’t be good for anybody—except other search engines.”
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