ELI5: Explain Like I'm 5

Apache Spark

Apache Spark is like a big magnifying glass that makes your computer much better at crunching lots of numbers, quickly. It takes all the numbers your computer is trying to figure out, and splits them into lots of tiny pieces so that your computer can do all the calculations at the same time. This means that your computer can figure out answers to complicated problems much faster, and your projects will be done in a fraction of the time it would normally take.