Now in its 25th season, Big Brother has had to come up with some twists and turns to help shake up the game. There are consistently new elements introduced to the series and exciting new competitions, or variations of old ones. But a handful of competitions, including endurance, Head of Household, Veto, and Have Not, have continued to come back because the fans can't get enough of them.
Source：https://www.cbr.com/big-brother-competitions-ranked/
