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Foursquare users can share their geographic information with their friends and receive virtual rewards such as "badges" when they arrive at a location via a smartphone or other Internet device "check-in" (check-in). In addition, some businesses began to use Foursquare promotions, users arrive at the store "check-in", you can get a discount when shopping.
Foursquare can be positioned by satellite or base station to track the location of the user. It is reported that 2010 completed "check-in" users from all over the world, even including the International Space Station, an astronaut, a total of 380 million people. The most popular places to check in are restaurants, followed by offices and shops in third place. The countries and regions that prefer to use Foursquare are the United States, Western Europe, Southeast Asia, Japan and Brazil.