Sections on other pages
Currently Shopify's dynamic sections are only available on the storefront.
This means that the design of your store's pages are limited to the functionality of Shopify's rich text editor. If you have an understanding of basic HTML and CSS, you can add in custom content using the html editor.
There are some great 'Page builder' apps in Shopify's app store that extend this sort of functionality to other areas around the store. These apps give you the ability to create very customizable pages using a drag and drop interfaces. See our recommended apps.
Alternatively, you could reach out to one of our partners for customizations if you're wanting to have something coded up.