https://wccftech.com/fallout-76-update-20-adds-the-games-first-season-public-teams-more/

Fallout 76 just got Update 20 today, sized around 4GB on PC and 11GB on consoles. Update 20 adds the game's first Season, titled The Legendary Run, while overhauling the existing systems of Challenges and Rewards.

Additionally, the much-requested 'Looking for Group' finder feature is being added today. Titled Public Teams, it'll let you join arms with other players while enjoying buffs depending on the Team Goal.