A database is a structured collection of information that allows for efficient storage, retrieval, and management of data. It serves as an abstraction over an operating system’s file system, enabling developers to create applications that can easily create, read, update, and delete persistent data. Databases can be categorized into various types, including relational databases, which organize data in tables, and NoSQL databases, which offer more flexible data models. By providing a reliable framework for data handling, databases play a crucial role in modern applications, from web services to enterprise systems, ensuring data integrity and accessibility.