LinkedIn is a professional networking platform with over 75 million members globally. The document provides an overview of how nonprofits can utilize LinkedIn to find candidates for jobs or volunteers, connect with donors and experts in their industry, and share knowledge within their organization. It outlines how nonprofits can set up a company profile and use LinkedIn to stay updated on their industry and tell others about their work. Tips are provided on setting up a profile, searching for people, engaging with groups, and asking/answering questions through LinkedIn Answers.