https://www.gamespot.com/articles/pubgs-fortnite-style-event-pass-available-today-wi/1100-6459915/

A new patch is around the corner for the PC version of PlayerUnknown's Battlegrounds. Coinciding with the update, developer PUBG Corp. is introducing a new type of progression system called the Event Pass, which gives players a new avenue for earning items in the game. [Update: The Event Pass is now available to purchase on Steam for $10.]

Much like the Battle Pass offered each season in Fortnite, the Event Pass allows players to earn rewards while playing PUBG. Event Pass holders will have a variety of daily, weekly, and map-specific missions to undertake; completing these challenges will level the pass up and in turn unlock exclusive rewards.