What is the main role of the Redis database in application architecture?

Redis in application architecture is typically used as a high-performance in-memory data store. Its main role is to provide fast access to data with minimal latency. Redis is often used for:

• Caching query results to reduce load on the primary storage
• Storing user sessions in web applications
• Implementing message queues and publish/subscribe mechanisms
• Supporting counters and other rapidly updated data

Thus, Redis helps improve application performance and scalability by storing data in memory and providing a simple interface for operations with it.