Metadata plays a crucial role in applications and user experiences, especially for large-scale businesses. It's essential to ensure the availability, performance, and consistency of metadata stores. To achieve this, consider factors such as structuring your data storage, implementing distributed systems for high availability, localizing data geographically, managing access controls, enforcing standards, ensuring strong consistency, monitoring and optimizing performance, securing data with encryption, and updating database software and schema without downtime. By following these best practices, you can create a robust metadata store that enhances user experiences while remaining invisible to users.