Is there anywhere you can enter a keyword and get a map that shows - geographically - where people are located who use or search on that term?
Seems like it would be a great way to track trends, fads and interests - given that websites and search engines often know your location. Is it more complicated than it sounds?
Here’s (pdf) a terrific academic article by Harvard econ doctoral student Seth Stephens-Davidowitz which uses Google Insight data for searches using a particular racial epithet and compares it to voting in 2004 and 2008, within “media markets” of the US (see page 43). The author contends that Google Insight offers a tool especially relevant to subjects which people tend to not be entirely truthful about (e.g., racial prejudice, or sex, or “embarrassing medical conditions”) in traditional surveys.