Over the past decade, crowdsourcing has emerged as a major problem-solving and data-gathering paradigm on the World-Wide Web, and has attracted much interest in the database community. This tutorial seeks to spark further interest and contribute to the gathering momentum of crowdsourcing in the community.  It provides an overview of current crowdsourcing platforms and applications, describes data management approaches to crowdsourcing, and identifies data management-specific research challenges in the area.