The vw unit is useful when we want to
define width of elements based on the screen
width.
Take a look at the following example:
vw is used here for the font-size
because we want the text size to change
proportionally with the change in the width
of the viewport.
Open this code in a new NeetoCode and
drag to change the width. You'll see that
the size of the text increases properly
with the change in the width of the viewport.