How does the use of relative URLs contribute to the maintainability of a website, especially when files need to be moved or reorganized?

Can you provide examples of when you would use an absolute URL and when you would use a relative URL in a web development project?

How do we view URLs from different spaces like VSC?

I am wondering if the website content changes, will the URL change

I have seen / in most web urls, but I've never seen .. in web urls. Are .. used in relative urls only? 

Can you use [..] to specify a destination with URLs?

In real life, which type of URL does big companies use more often and why?

I don't have any questions at the moment, the reading was clear.