Chapter 2, Season 8 of Fortnite introduced questlines into Battle Royale, a feature that was in Save The World ever since its release. One of the questlines, Build Passion, is all about building and destroying other builds, brought to us by none other than Penny!
Cheat Sheet

The Quests
Destroy Opponent Structures (5)
Accept Dialogue: New builders often have bad habits. Let’s start them off with a clean slate.
Guide: I recommend dropping at a populated area for this or waiting until the late-game when enemies have more materials.
Complete Dialogue: Excellent! Plenty of space to build something beautiful.
Reward: 12,000 XP and 20 Bars
Build Structures At Craggy Cliffs (5)
Accept Dialogue: Builders should understand the materials at their disposal.
Guide: This is self-explanatory.
Complete Dialogue: A strong foundation in the fundamentals is key.
Reward: 14,000 XP and 25 Bars
Harvest Metal From Both Weeping Woods And Steamy Stacks (2)
Accept Dialogue: Gather some quality metal. It makes for stronger structures.
Guide: Since both POIs are on opposite sides of the map, I recommend doing this in 2 different matches.
Complete Dialogue: Perfect, these materials will do nicely.
Reward: 16,000 XP and 30 Bars
Hit Weak Points While Harvesting (4)
Accept Dialogue: A skilled builder can identify any structure’s weaknesses.
Guide: Weak points are the circles that pop up whenever the player is harvesting.
Complete Dialogue: That was a great example!
Reward: 18,000 XP and 40 Bars
Emote Within 10m Of An Allied-Built Structure (1)
Accept Dialogue: It’s always worth taking the time to celebrate a job well done!
Guide: You can probably pull this off by going into Squads (Fill) or, if you re on Xbox/PlayStation, using a secondary controller for split screen.
Complete Dialogue: A quality build deserves a proper huzzah!
Reward: 20,000 XP and 70 Bars