The display property has been in CSS from the beginning,
handling everything from block and inline boxes
to list-items and full layout systems like flexbox or grid.
Now the display syntax is getting an upgrade
to match it’s multiple uses.
allow us to be more explicit and expressive about layouts
Repost from Mozilla Developer
display propertyThe new display spec adds flow and flow-root values,
and allows for setting inner layout (grid, flex, etc)
as well as outer box type (inline, block), and more.
It might not be something we use much right away – but it still helps me understand all the power inside this one property.