Hi Alexander,
CI/CD implementation is a fairly complex practice that required a certain level of mindset and background knowledge of Software engineering concepts way behind just writing code; which we tried to explain and demonstrate in the most basic way we could. We are sorry and understand your frustration in not being able to comprehend or grasp the content of this article on any level. Please refer to other online resources and documentation to learn more about the very basics of software development concepts.
Cheers!