After installing Schema Premium and configure it on your site, you will need to enable the plugin across your content. By default; WordPress has two main post types for posts and pages, you will need to create two entries for “Post” and “Page” post types under the Schema > Types
section.
Schema Types section is a special custom post type that is used to create and save schema.org types to be used by the Schema Premium plugin to markup your choice of site content.
This unique feature will allow you to enable schema.org types and set location targeting for each type across your site.

Adding a Schema Type
You can enable a new schema.org type and enable it on your site by clicking on the Add New
button.
A new window will open where you can select the schema.org type of your choice:

Editing Schema Types
You can edit each schema.org type to modify it per your liking. Once you save your modifications, the Schema Premium plugin will start processing it though your content to output a valid schema.org markup in JSON-LD format.
This is how the Schema type edit screen looks like:
