Let's use the example of a book. You want to promote your book, but you're not sure how. There are many ways to promote any item in Podpage.
You can use the announcement bar, and create a text link to your item (see video).
You could use the custom content on the home page (see video).
You could add it as a product to your storefront (see video).
You could use the custom content on the sidebar feature (see video).
You could add a link to the navigation bar (see video).
You could create a custom page to promote your book (see video).
You could promote them in the episode footer and have the message added to the bottom of every episode (see video).