Google launched a new product very useful for advertisers and marketers. It include a world heat map for the search volume and regional interest, the evolution for a specific search term and the top related and rising searches.
With Google Insights For Search, it is possible to compare search volume trends across multiple search terms, categories, geographic regions, and specific time ranges.
Google AdWords blog details the specific characteristics of this new product and gives some examples to use it.
I have to admin that Google Insights For Search, together with Google Trends and some other older application of Google, become gold in the hands of the advertisers during their marketing campaigns.