Piercing enchantment?

I got a book with the magic of piercing when fishing in Minecraft. Nowhere can I find out what this enchantment does…

This should normally be used on the crossbow to hit multiple entities in a row

Thank you.

Bullet / Pierce [https://minecraft-de.gamepedia.com/index.php?title=Verzauberung&action=edit§ion=11]

Bullet

ID name piercing

At the magic table

Max. Effect level IV

Can't be combined https://minecraft-de.gamepedia.com/...fachschuss

The arrow flies through the target and can hit one or more (corresponding to the enchantment level) further (s) behind it.

This is from Minecraft Gamepedia