LinkedIn is a professional social media platform with over 610 million members. It sees high levels of engagement, with comments, likes and shares up over 60% year-over-year. Many senior level influencers and decision makers use LinkedIn. The document provides tips on optimizing a LinkedIn profile, including adding a professional photo and headline, a descriptive summary, complete work history, skills, and recommendations. It also outlines strategies for engagement through posting updates, commenting on others' posts, and joining groups to build a personal brand on the platform.