Big Brother is a reality competition television show where a group of contestants, called HouseGuests, live together in a specially constructed house isolated from the outside world. Their every move is continuously monitored by numerous cameras and microphones 24/7. The HouseGuests compete in various tasks and challenges, and each week, they vote to evict one of their own. This process continues until only one HouseGuest remains, who wins a grand cash prize-currently $750,000 in the American version

. The show is based on the Dutch original created by John de Mol Jr. in 1997 and takes its name from the character "Big Brother" in George Orwell's novel Nineteen Eighty-Four , symbolizing constant surveillance

. The format is considered a social experiment, showcasing how people interact, form alliances, and strategize while living under constant observation. Viewers also get to see personal dynamics, including friendships and romantic relationships, develop among the contestants

. In the American version, the HouseGuests are encouraged to strategize and compete in gameplay to avoid eviction, with evictions decided by the HouseGuests themselves rather than public voting. The show has evolved from its original format, focusing more on competition and strategy since its second season

. In summary, Big Brother is about contestants living together under constant surveillance, competing in challenges, forming social bonds, and voting each other out until one wins a large cash prize. The show blends elements of social interaction, strategy, and competition within a confined, monitored environment