Fauna addresses the challenges of building multi-tenant applications by providing a native support for hierarchical parent-child database structures, enabling streamlined management of tenant databases with individual access controls and logical isolation. This approach reduces complexity, allowing developers to focus on building features and improving user experience rather than managing infrastructure. With Fauna, optimal performance, robust security, and compliance can be achieved with minimal manual configuration, significantly reducing cognitive overhead and accelerating feature development. The choice between creating child databases per tenant or using collections per tenant depends on the specific needs of the application, including security requirements, ease of management, and performance considerations. A hybrid approach combining parent databases for shared resources and child databases for tenant-specific data often provides a balanced solution, optimizing for both security and operational efficiency.