Block entity

A block entity (also known as a tile entity) is an additional object associated with certain blocks.

Block entities can store additional information about their block, beyond the finite set of block states that a block may have. For example, all blocks that can store items use a block entity for this purpose. Block entities can also tick, running code regularly while loaded, even when not interacted with directly. Complex rendering not available to normal block models is also achieved with block entities. Blocks with block entities can be moved by pistons in Bedrock Edition, but not in Java Edition.

These are the current blocks that hold block entities.