IBM Watson Studio offers certain Spark environments that you can use as default Spark environment definitions to quickly get started with Spark in Watson Studio without having to take the time to create your own Spark environment definitions. This saves setup time and allows you to spend your time creating solutions rather than administering an environment.
Spark environments are available by default for all Watson Studio users. You don't have to provision or associate any external Spark service with your Watson Studio project. You simply select the hardware and software configuration of the Spark runtime service you need to run your tool and then when you start the tool with the environment definition, a runtime instance is created based on your configuration specifications. The Spark compute resources are dedicated to your tool alone and not shared with collaborators—https://medium.com/ibm-watson/ibm-watson-studio-spark-environments-generally-available-f3dda78d3668.