Okay kiddo, let me tell you about something called a shared library. A shared library is a special type of computer program that can be used by other programs. It's like a big library that lots of different programs can go to and borrow things from.
When a program needs to use something that's in the shared library, it can grab it and use it without having to make a copy of it. This makes it really efficient and saves space on your computer.
It's like if you needed a pencil to draw a picture, instead of having to buy a new pencil every time you drew something, you could just go to the pencil library and borrow a pencil whenever you need one. And lots of different kids can use the same pencil library, just like how lots of different programs can use the same shared library.
So, to sum it up, a shared library is a place where programs can go to borrow things they need to work properly, without having to create their own copies of those things. It's like a big pencil library for computer programs!