This template is intended to be called via substitution, its purpose is to redirect to the {{citewo}} template while adding a parameter "Retrieved" along with today's date in the process.
Usage: {{subst:wo|1|1|15}}
After placing that on the text of a page, saving, then viewing the wikitext again the result will be (if today was November 30th):
{{citewo|1|1|15||retrieved=November 30, 2023}}
Just as if you had used the citewo template yourself to begin with. Template:Wo is just a shortcut. It accepts the same parameters as Plantilla:Citewo, view that page for further documentation.