Okay kiddo, a pawn shop is a store where people can bring their stuff and get money for it. When people need money for something like paying their bills or buying food, they can take something they own to a pawn shop and ask the owner if they will give them money for it.
The store owner will take a look at the item and decide how much it's worth. Then they will offer the person a certain amount of money for it. If the person agrees, they give their item to the store owner who puts it on a shelf in the store.
Now, the person can come back to the pawn shop within a certain amount of time (usually about a month) and give the owner the same amount of money they were given for their item to get it back. This is called paying back the loan.
If the person doesn't come back to get their item or if they don't pay back the loan on time, then the store owner can keep the item and sell it in the store to anyone who wants to buy it for the full price.
So basically, a pawn shop is a place where people can get money for their things in a hurry, but they have to pay it back or they will lose their item forever.