https://www.gamespot.com/articles/fortnite-challenge-guide-for-week-5-follow-snobby-/1100-6461050/

We're now into Season 5, Week 5 of Fortnite, which means there's a new selection of challenges for players to complete on PS4, Xbox One, PC, Nintendo Switch, and iOS. As with previous weeks, the newest batch are split between challenges that are available to all players, and a small selection of additional ones that are only accessible to Battle Pass owners. Completing the challenges unlocks Battle Stars, which contribute towards leveling the Battle Pass up and unlocking fresh new items to customize your character with.

This week's challenges for the free tier involve searching for seven chests in Junk Junction and eliminating three opponents in a single match. On top of that, you'll need to use three Rift Portals. Since Rift Portals appear randomly, this one is going to involve spending some time running around searching for them, so we recommend getting on with the other challenges but keeping an eye out for rifts.