What does it do?

This allows ore veins and trees to be mined or harvested faster. It also supports enchantments, ensuring no items are lost during the process. Additionally, experience levels are transferred immediately after mining ores.

Use

For this to work, you first need to crouch and then mine an ore with the appropriate tool so that the adjacent blocks are mined as well.

The same thing works with trees, too except that here you have to make sure you don't just mine any random block, you have to mine the trunk for it to work.

experience

Depending on the ore, varying amounts of experience are dropped. Wood or other types of ore, such as iron, do not yield experience.

Enchantments

fortune

silk touch

unbreaking

The Unbreaking enchantment is also supported however, there is no preview for this, as the comparison wouldn't be very clear. It's best to try it out for yourself :)