What does simulate Witcher 2 save mean in The Witcher 3?

If you've started up The Witcher 3 Remastered and are wondering what the 'simulate Witcher 2' option does, I've got the answers and some advice regarding whether you should or not - even if you've never played The Witcher 2.This option is actually quite important, as it changes some of the main story beats and even adds/removes quests depending on what you choose, so here's what you need to know about simulating your Witcher 2 save in The Witcher 3 Remastered.Should you simulate a Witcher 2 save