When you get a present in the mail, it comes in a box or a bag. Sometimes, the thing inside the box or bag is breakable, meaning it can get damaged or even broken if it's not handled carefully during shipping. That's where package cushioning comes in!
Cushioning means adding something soft or bouncy to protect the breakable thing inside the box or bag. It's like if you're playing with a ball inside your house and your mom asks you to put a pillow down to catch the ball so you don't accidentally break anything. In shipping, the package cushioning is kind of like that pillow - it's there to catch or absorb any bumps or drops that might happen while the box or bag is being moved around or travel inside a truck or an airplane.
Package cushioning can be made out of lots of different things. Sometimes it's squishy foam that comes in different shapes or sheets, or bubbles that feel like they're full of air. You might have even played with bubble wrap before! Other times it's paper that's crumpled up tight, sometimes it's plastic stuffed full of air or stuff from the farm, like corn husks, that has been cut into small pieces. All of these types of package cushioning work to protect the breakable thing inside the package by keeping it safe, even if the box or bag gets bumped around a lot.
It's important to use package cushioning because it can help make sure that the breakable thing inside the package makes it to its destination safe and unbroken. So, whenever you receive a package with cushioning inside, it's like the sender gave your present a big, soft hug before sending it your way!