Apache Pulsar is an open-source distributed messaging system designed for high-throughput and low-latency data streaming. It supports both queue-based and publish-subscribe messaging models, making it versatile for various applications. Pulsar's architecture separates storage and compute, allowing for efficient scaling and management of data. One of its key features is multi-tenancy, which enables multiple users or applications to share the same infrastructure securely. Apache Pulsar also provides strong durability and consistency guarantees, ensuring that messages are reliably stored and delivered. This makes it suitable for real-time analytics, event-driven applications, and IoT scenarios.