Whitespace is the empty spaces in a design. Whitespace is used to separate disparate design elements and group similar ones. Whitespace is the lack of graphics or text in the layout.
Whitespace is not always "white" - it is the empty parts of the page, but if the page has a different background color that will be the color of the whitespace.
Whitespace Characters
In HTML there are several characters that create whitespace. They are: a space, a tab, and a carriage return (or linefeed).

