Bleed, safety margin and format

#1 How is the size calculated for free-form stickers, contour-cut stickers, or stickers "without a background"?

#2 What happens if I don't add bleed?

#3 When is a sticker produced in multiple parts?

#4 What does “multi-part products” mean?

#5 Do I need to add crop marks or registration marks?

#6 What does safe distance mean?

#7 How much bleed should I add?

#8 What does bleed mean?