Margin in CSS

The separation between most normal-flow elements occurs because of element margins. Setting a margin creates extra "blank space" around an element. "Blank space" generally refers to an area in which other elements cannot also exist and in which the parent element's background is visible

margin

Values

[ | | auto ]{1,4} | inherit

Initial value

not defined

Applies to

all elements

margin can accept any length of measure, whether in pixels, inches, millimeters, or ems. However, the default value for margin is effectively 0 (zero), so if you don't declare a value, by default, no margin should appear