EMR

EMR stands for "Elastic MapReduce"
EMR helps creating Hadoop clusters (Big Data) to analyze and process vast amount of data
The clusters can be made of hundreds of EC2 instances
Also supports Apache Spark, HBase, Presto, Flink...
EMR takes care of all the provisioning and configuration
Auto-scaling and integrated with Spot instances
Use cases: data processing, machine learning, web indexing, big data...