In current Minecraft updates that include it, the copper golem is basically a small utility mob that helps automate item sorting and storage rather than fighting mobs or following the player.

What the copper golem actually does

  • It moves items from copper chests into nearby normal or trapped chests, acting as a mobile item sorter and organizer.
  • It takes up to 16 of a single item type from a copper chest at a time and then looks for a good chest to place them in.
  • It prefers:
    • Empty chests, or
    • Chests that already contain the exact same item (same type, name, and enchantments) and have space.

How it behaves in the world

  • You create one by placing a copper block and putting a carved pumpkin on top; when it spawns, it also generates a copper chest underneath it in some versions.
  • It wanders between copper chests and nearby wooden or trapped chests, checking a limited number of chests in sequence and then pausing briefly if it cannot find a good place for its items.
  • Its body is copper, so it oxidizes over time, slowly turning green unless you wax it or otherwise reset the oxidation state, which can affect how it looks and in some designs how it is used decoratively.

What players use it for

  • Building automatic storage systems where the copper golem pulls items from one “input” copper chest and distributes them into categorized chests.
  • Creating more fine‑grained sorting than with allays, since it can distinguish exact items, including durability and enchantments in advanced setups.
  • Setting up redstone contraptions and “living” storage rooms that feel more dynamic, with little golems walking around managing your loot.

In short, when people ask “what does the copper golem do in Minecraft,” the answer is: it is an automated item‑sorting helper that moves items from copper chests into nearby chests, making storage systems smarter and more fun to watch.

Information gathered from public forums or data available on the internet and portrayed here.