A hopper in Minecraft is a block that can transport items from one place to another. It is crafted from five iron ingots and one chest, and can be placed on the ground or attached to the side of a block. Hoppers can be used to automate various tasks, such as sorting items, transporting items between chests, and fueling furnaces.
Hoppers are powered by redstone, and will only activate when they are powered. When a hopper is activated, it will pull items from the block above it (if there is one) and push them into the block below it (if there is one). Hoppers can also be used to transfer items between two chests, by placing a hopper below one chest and another hopper above the other chest.
