There is where you would start to set up your website. You will be guided through written/video tutorials on how to get your website to look like or similar to the demo template.
Once you have your website completed, and if you have any other questions about that particular theme you can browse the FAQ’s. For example, if you want to add another page, book a blog post, etc but don’t want to go through all the steps in the Step Up section, you will find the instructions to do that under FAQ’s. If you can’t find the answers there, you can always submit a ticket.