Copper Ingots are a metal resource obtained by smelting raw copper in a furnace or blast furnace. Killing drowned mobs has a chance to drop Copper Ingots as well.
Copper Ingots are primarily used to craft lightning rods, which redirect lightning strikes, and spyglasses, which allow players to zoom in on distant objects. They also go into other crafting and repair recipes.
Copper Ingots are a key resource for crafting functional items in Minecraft.