Every night, adventurers sleep in a vast wilderness, making home wherever they may go. The combination of a warm campfire, hunted meat, and a bard's song can dissipate any kind of fatigue. The skill allows you to gather common Firewood to make a campfire. This campfire will help you recover from fatigue and keep you safe from animals that fear fire.
To get a the skill humans complete the Campfire beginner quest, Elves learn it in the beginner quest Collect Firewood, Giants learn it in the second beginner quest Collect Firewood, and any of them can learn it by reading the book Campfire Manual in detail.