Apache Spark is an open-source, distributed processing system used for big data workloads. It provides an interface for programming clusters with implicit data parallelism and fault tolerance. Spark supports Java, Scala, R, and Python, and is used by data scientists and developers to rapidly perform ETL jobs on large-scale data. It has libraries like SQL and DataFrames, GraphX, Spark Streaming, and MLlib which can be combined in the same application. The framework enhances traditional ETL processes by enabling organizations to make faster data-driven decisions through automation. It efficiently handles incredible volumes of data, supports parallel processing, and allows for effective and accurate data aggregation from multiple sources. Additionally, its in-memory data processing makes it a faster data processing engine than other options currently available.