UUID Purpose and scenario

With the launch of Kirby 3.8 came UUID’s. Does this mean if a user changes the page URL all links to that page will still work?

Sorry, this may seem a dumb Question but I haven’t heard of UUID before.

Exactly that is the purpose, but it will depend on how you set the link (if it uses the UUID), e.g. via $page->permalink() or now our Panel uses UUIDs for the pages, files field - so those references/relations stay much more stable.