https://www.gamespot.com/articles/fortnite-season-4-how-to-earn-a-free-battle-pass-s/1100-6458711/

Fortnite Season 4 is officially underway, which means a new Battle Pass and accompanying weekly challenges are available. There are some new wrinkles for this season, but the challenges otherwise work as they have in the past. That said, there is a secret hiding in the Week 1 challenges that is worth tracking down if you're eager to level up and get your hands on the coveted Omega skin as quickly as possible.