Three attributes that are true regarding Subscriber Pages are:
Subscriber Pages can include additional standard Salesforce B2B Commerce components such as featured products, category tree, and mini cart. These components can be added to the Subscriber Pages by using the CCRZ.pagevars.pageLabels and CCRZ.pagevars.pageSections objects, which contain the page labels and page sections that are defined in CCAdmin.
Subscriber Pages allow customers to quickly create new custom pages for their storefront. These pages can be used to display any content or functionality that is not available in the default pages, such as FAQs, testimonials, or promotions.
Out of the Box, Subscriber Pages are completely blank HTML pages. These pages do not have any predefined layout or content, so the user can customize them according to their requirements. The user can use Visualforce, HTML, CSS, JavaScript, or any other web technologies to create their own Subscriber Pages. Salesforce B2B Commerce and D2C Commerce Developer Guide,Subscriber Pages