PropelAuth's Role Mappings feature provides a streamlined solution for configuring SaaS pricing plans by linking them to product roles and permissions, enabling flexibility as users transition between free, paid, and enterprise plans. The tutorial outlines a model for a ticket system inspired by Zendesk, introducing three roles: Owner, Manager, and Agent, each with specific permissions such as managing billing, viewing and exporting reports, and accessing live agent activity. The guide demonstrates how to implement these roles using PropelAuth's system by renaming default roles, defining permissions, and setting up role mappings for each pricing tier. It highlights the ease of assigning organizations to specific plans through role mappings, ensuring that access to features is appropriately managed as users upgrade between plans. This approach not only simplifies the process of managing user access and permissions but also allows for customization to meet the evolving needs of applications.