Expanding databases is a crucial aspect of modern application development, particularly as user demand and data volumes grow. This process involves scaling the database infrastructure to maintain optimal performance and ensure efficient data management. Various strategies can be employed to achieve this, including indexing, which enhances query performance, and distributing data across multiple servers to balance load. Understanding the right scaling techniques is essential, as improper choices can lead to performance issues and hinder application functionality. By effectively expanding databases, organizations can support their growth and provide a seamless user experience.