Amazon Simple Storage Service (S3) is a highly scalable, durable, and secure object storage service offered by Amazon Web Services (AWS). S3 allows businesses to store and retrieve any amount of data from anywhere on the web by making use of its enterprise-level services. S3 is designed to be highly interoperable and integrates seamlessly with other Amazon Web Services (AWS) and third-party tools and technologies to process data stored in Amazon S3. One of which is Amazon EMR (Elastic MapReduce), which allows you to process large amounts of data using open-source tools such as Spark.

Apache Spark is an open-source distributed computing system used for large-scale data processing. Spark is built to enable speed and supports various data sources, including the Amazon S3. Spark provides an efficient way to process large amounts of data and perform complex computations in minimal time.