Apache Spark is an open-source unified analytics engine for large-scale data processing. It offers an advanced execution engine that supports in-memory computing, making it much faster than traditional disk-based processing frameworks. Spark includes built-in modules for various types of data processing such as streaming, SQL, machine learning, and graph processing, all integrated into a single framework. This versatility allows developers to perform complex analytics and data processing tasks seamlessly. Spark’s ability to process data in real-time as well as in batch mode makes it a powerful tool for big data analytics.