Using the Site Builder module, you can customize the way your storefront looks, add pages, and include more functionality to your website. You can access Site Builder from the home page.
The Site Builder is based on Zoho Sites, which is a website building tool, on its own. Have a look at Zoho Sites' help guide for elaborate resources on how to set up and customize your storefront and your website. Skip straight to "Adding elements" in the Beginners Guide section.
Click Preview on the top-right corner to have a look at your changes before publishing your site. When you preview your site, your changes won't be made in your actual site. Your changes will reflect in your site only when you click Publish.