What is the Hero's loot for?

What is the Hero's loot for? - Man Wearing Brown Leather Jacket Holding Black Android Smartphone With Brown Case

This may be a dumb question, but I could find NOTHING for this.

In Heroville you have loot in your hero's when they're hunting. What is this loot? Can I use it? How does it work?

heroville

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What is the Hero's loot for? - Free stock photo of baby clothes, bear, decorations

What is the Hero's loot for? - Free stock photo of administration, adult, beer

What is the Hero's loot for? - What Text on a Pink Surface

What makes a hero? - Matthew Winkler

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Images: Enoch Patro, Pavel Danilyuk, Laura Tancredi, Ann H