Okay, imagine you're playing hide and seek with your friends. You found a really good hiding spot, but you accidentally knock over a toy and make a loud noise. Your friend says "shhh!" and puts their finger up to their lips to tell you to be quiet. That's called hushing.
Hushing is when someone makes a quiet noise or tells someone else to be quiet. Sometimes we hush because we don't want to wake someone up who is sleeping, or we don't want to interrupt someone who is talking, or we don't want to scare away a bird or animal we're trying to watch.
It's important to remember to hush when we need to be quiet, but it's also important to use our regular speaking voices when we're allowed to talk. So next time you're playing hide and seek or trying to be quiet, remember to give a little "shhh" to keep the noise down!