In Schema Premium plugin; each schema.org type you enable contains a set of location rules, which are used to determine where to enable each schema.org type throughout your WordPress site content.
This documentation page explains how to set target location rules in Schema plugin.

Adding a new rule
Adding a custom location rule consists of 2 simple steps:
- Define the rule type (target type)
- Define a value for the rule type (target content).
1. Adding a custom rule type

When editing a Schema type, the ‘types’ drop down is the first dropdown in the location rule row.
2. Adding a custom rule value

When editing a Schema type, the ‘values’ drop down is the second dropdown in the location rule row. This list is dynamically updated based on the selected ‘type’.