This assistant is to register all the possibilities offered by the premium plugin that you can find at WooCommerce.com. For the basic plugin, you simply need to request to be registered with Redsys for credit card payments.
Just follow the assistant, and at the end, you will have a document that you can present at your bank branch, either physically or through your online advisor, with everything you need and the precise instructions for everything to work and be activated with all you need.