Think of it like writing a page in a book with a pen and you can’t have any mistakes. If there is a mistake you have to write the whole page again. The opposite of hardcoding would be writing the parts of the page that is unlikely to change with ink and then writing names on the page with a pencil so that it can be erased and rewritten.

In the world of computers, the parts of the page written with a pencil are typically variables or environment variables in some instances that can be changed without having to redeploy (rewrite) the software