Okay kiddo, let me tell you about service wrappers in a way that's easy to understand.
Imagine you have a toy that needs to be protected from the rain. You could wrap the toy in plastic wrap so that it doesn't get wet. A service wrapper is like that plastic wrap, but for computer programs instead of toys.
Now, let's say you have a computer program that you want to protect too. Maybe you're worried that it could crash and cause problems for your other programs. A service wrapper can help by putting a "wrapper" around the program that keeps it safe and stable.
This wrapper acts like a guard. The program can't do anything it's not supposed to do, and if it does try to do something bad, the wrapper stops it. The wrapper also makes sure the program stays running smoothly, kind of like a coach who helps their team play the game better.
So that's what a service wrapper is, a protective layer around a computer program that keeps it safe and running as it should.