If you will use one page offer then customize existing special-discount-offer page which has our default offer short-code.

But if you wanna use different pages for different offers then,

Create your own custom page and use our short-codes from Custom Page Short-codes tab in our settings.

Then paste that page URL in custom offer page URL in funnel offer settings.

make sure to save in every offer.

Remember our short-codes won’t show any content if you just view the page, to properly test you need to reach that page after checkout.