Apache Kafka is a distributed streaming platform designed for high throughput and fault tolerance. It organizes data into categories called topics. Producers send data to these topics while consumers subscribe to them to process the information. Kafka stores data in a partitioned log format which allows multiple consumers to read the same data at once. The system is highly scalable because it distributes partitions across a cluster of many servers. It is built to handle trillions of events per day with very low latency. Data is persisted to disk and replicated across nodes to prevent any data loss. This makes it ideal for real-time analytics and tracking activity on massive websites. It serves as the central nervous system for data in modern distributed architectures.