Help with understanding how to execute

Question

I saw a code that I'm trying to add on my website, it's purpose is to scramble text when it's copied but the explanation is too complicated, is there anyone that has time to break it down like I'm 10 years old, please and thank you.

https://sololearn.com/compiler-playground/W3XYV93jepal/?ref=app

Answer 1

Specify the link to the source.