The nl2br tag stands for 'newline to BR' and can be used to convert all newline characters in a string to HTML <BR> tags.
It comes in handy in situations where you have an editable region of textarea type and while displaying the data contained within it, you wish to replace all the newlines entered by the user with <BR> tags.
<cms:nl2br><cms:show some_variable /></cms:nl2br>
This tag takes no parameters. All content enclosed within its opening and closing tags serve as its input.
This tag does not set any variables of its own.