Arc Raiders expeditions explained
via polygon.com
Short excerpt below. Read at the original source.
Arc Raidersexpeditions are a somewhat confusing prospect, because they take a lot of effort to complete, and while you do get some decent rewards, you’d be forgiven for thinking it isn’t worth doing. You sacrifice basically all of your progress thus far, including stash, skills, workshop upgrades, and more, in order to start from scratch.