When is it recommended to use NoSQL databases instead of traditional relational systems?

NoSQL databases are recommended to be used in the following cases:

• When data has a flexible or changing structure (e.g., documents, key-value, graphs).
• When horizontal scaling and high performance on large data volumes are required.
• If the application requires quick data access without complex SQL queries and transactions.
• For processing large streams of data in real-time.

For example, NoSQL is often chosen for storing user sessions, logs, social graphs, or IoT data, as relational databases can be less efficient due to rigid schemas and scaling limitations.