LinkedIn is a professional social media platform with over 100 million members that has replaced resumes for connecting with other professionals, optimizing one's personal brand, and finding job opportunities. The profile allows users to provide details about their title, experience, education and customize keywords for searches by others. Users can join up to 50 professional groups to participate in discussions, find relevant articles and job postings, and view other members. Additional features include seeing who is attending events to organize meetups, sharing books being read, syncing with Twitter, and viewing competitor profiles.