The hide tag is a very simple tag that can be used to prevent the output of code enclosed within it from being displayed.
<cms:hide> ...Everything here will get executed but the output will never appear on the webpage... </cms:hide>
This is useful when you wish to execute some Couch tags but do not wish their outputs to get displayed.
Compare this with the ignore tag where the enclosed contents are not executed at all.
This tag takes no parameters. All enclosed contents serve as its input.
This tag sets no variables of its own.