Foursquare is a platform that provides location-based services and recommendations for users and businesses. Its purpose is to help users discover and experience the best places and activities around them, and help businesses attract and retain customers. Foursquare allows users to search and explore nearby venues, events, and deals, check in and share their location, and access personalized tips and insights. Foursquare is designed to be used by users who want to explore and enjoy their surroundings.