Facebook has launched a new location-based service called Facebook Places that allows users to check-in at locations and share their location with friends. The service aggregates check-ins onto users' profiles and the Places Page for that location. It allows users to find friends nearby and discover new places. While this enhances sharing and discovery, it also raises privacy concerns since check-ins are public by default. The service provides new opportunities for brands to engage with customers, gain insights into customer locations and conversations at venues, and target ads locally. It also introduces scalability challenges for national brands with multiple locations.