This document provides statistics and information about Foursquare, including over 3.5 billion check-ins, 50 million user accounts, and 1 million claimed merchants. It notes that Foursquare has around 1 million registered users in Russia with over 260 million check-ins and 2.4 million points of interest. The document also discusses Foursquare's API, trends in tips and photos, tools for discovery and recommendations, and relationships with merchants.