Stack Overflow is a question and answer community for programmers. It was founded in 2008 by Joel Spolsky and Jeff Atwood and is headquartered in New York City. The website allows users to ask and answer questions related to programming and software development. Stack Overflow has a reputation system that rewards users for their contributions and encourages them to provide high-quality answers. The company also offers a job board and advertising services for companies looking to hire developers. Stack Overflow has a large and active community of users, with over 50 million unique visitors per month.