Posts Table displays content already stored in the WordPress database – it doesn’t create the content for you. If you want to display content such as custom post types, custom fields, or taxonomies, you will need to set them up beforehand and then display them using the Posts Table.
You can choose from any of the following: id, title, image, content, button, excerpt, published date, last modified date, author, tags, categories, status, custom taxonomies, and any custom field. Your columns can contain extra formatting and multimedia content such as embedded audio or video.