The document discusses the popularity and demographics of major social media platforms like LinkedIn, Facebook, and Twitter. It notes that nonprofits are increasingly using social media to reach target audiences, build supporters, educate the public, and promote events and fundraising. Specific advice is provided on using LinkedIn, Facebook, and other tools like HootSuite to engage audiences and maintain a multi-dimensional online presence while balancing professional and personal content. Building relationships is emphasized as a key goal of nonprofit social media use.