Can you provide an example of a situation where using Kafka is the optimal solution?

Kafka is optimally used in systems where there is a need to process large streams of data in real-time with high throughput and reliability. For example, in a user activity monitoring system on a website, where events (clicks, views) need to be quickly collected, processed, and analyzed for personalization or analytics. Kafka allows efficient transmission of these events between services, ensuring scalability and fault tolerance.