Google has several tools that give insight into global, regional, past and present search trends. There are 4 main areas here that real insight into how Google works. 

• Google Trends – For a broad look at search query data, enter up to five search terms to see relative popularity over time.
• Trends for Websites – Google Trends for website traffic data. Type in a website address to see visitors by region and related sites visited.
• Insights for Search – A deeper dive into search query data for marketers and power users. Create your own lists of "most popular" and "fastest rising" queries for different geographic regions over time and by topic.
• Hot Trends – The top 100 fastest-rising search queries right now (U.S. only). Updates throughout the day.

Learn more about Google Press Center: Zeitgeist

Related posts:

1. Google Flu Trends in Real-Time Google Flu Trends uses aggregated Google search data to estimate...
2. How to use Google News Timeline – News As it Happens Over Time How to use Google News Timeline - News As it...
3. Customize your Google Search Results with Subscribed Links You can now customize the Google search results pages with...
4. Customize your Google Search Results You can create your own customized Google search engine by...
5. New Google Insight For Search Beta Google Insight For Search Beta Originally uploaded by Tech...