In the Categories Editor place a check in the checkbox under Active field.
When {CATEGORY-ACTIVE} is added to a category template page it will translate into Yes if the active category checkbox is checked.
When {CATEGORY-ACTIVE} is added to a category template page it will translate into No if the active category checkbox is unchecked.
Source Code
Source Code Updated:
When a web page using a template that contains this QuickCode Tag is viewed in the storefront, the {CATEGORY-ACTIVE} QuickCode Tag is changed into the source code below prior to the web page being displayed.