ESPN Fantasy is an online platform that allows users to create and manage their own fantasy sports teams across various leagues, including NFL, NBA, MLB, and NHL. Participants draft real-life athletes and earn points based on their performance in actual games. The platform offers tools for team management, including player rankings, trade options, and injury updates. Users can join public leagues or create private leagues with friends, making it a popular choice for sports enthusiasts looking to engage more deeply with their favorite games.