How and where to use [url] shortcode

Hi all!

I am using the coupon theme and I am trying to include a visit homepage button to all my seperate stores. I have tried using [url] and [code title=””][url][/code] with and without all capitals but no results or changes at all. The link is in the store settings under: website link

I am trying to add the visit homepage button to the default layout under page setup -> listing page.

What am I doing wrong?

Thank you in advance!