1) Facebook is a popular social networking site that allows users to create profiles, connect with others, and share content. It has become a major platform for social interaction, especially among younger users. 2) Nonprofits can benefit from using Facebook by expanding their reach to find potential volunteers, donors, and supporters. It allows them to engage with like-minded organizations and spread their messages cost-effectively. 3) To use Facebook effectively, nonprofits should first observe how other organizations, their target audiences, and Facebook users in general interact on the platform to understand its culture before creating a presence. They should start gradually, such as promoting specific events, rather than making a large initial splash.