CBS Sports 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 drafting, trading, and managing rosters, along with expert analysis and player rankings. Users can join public leagues or create private leagues with friends, making it a popular choice for both casual and competitive players looking to enhance their sports viewing experience.