I. Introduction
Database schema design is a critical aspect of building performant and scalable NoSQL databases. Also known as non-relational databases, NoSQL databases are becoming increasingly popular for storing and managing large volumes of unstructured and semi-structured data. However, the lack of a fixed schema in NoSQL databases can sometimes result in performance issues and data inconsistencies. Therefore, designing an efficient schema is crucial to ensure that the database can handle the required volume and complexity of data while maintaining optimal performance.