This document discusses location-based services and the geosocial networking app Foursquare. It provides an overview of how Foursquare works for both users and businesses. Key points include: - Foursquare allows users to "check in" at locations and see who else is there. It provides recommendations and allows users to earn points and badges. - Businesses can claim their venue, see analytics on customers, and offer special deals ("specials") to loyal Foursquare users like the Mayor who checks in most. - The document provides tips for businesses on how to use Foursquare effectively, including using specials, analytics, reviews, and insider tips to engage customers.