What is the role of databases in modern information systems?

Databases in modern information systems play a key role in storing, organizing, and managing data. They provide:

• Reliable data storage — data is stored in a structured manner and accessible for quick retrieval.
• Integrity and consistency — support for transactions and constraints to ensure data correctness.
• Multi-user access — simultaneous work by many users with the data.
• Query optimization — indexes and caching for fast access to needed information.

For example, in a web application, the database stores information about users, orders, and products, ensuring quick and secure access to this data.