Anna Wykes continues a series on DevOps for Databricks:
An Environment Variable is a variable stored outside of the Python script; in our instance it will be stored on the DevOps Agent running the DevOps Pipelines. Consequently, it is accessible to other scripts/programs running on the DevOps Agent. We will not cover DevOps Agents in this blog specifically, the simplest description is that they are the compute that runs your pipeline, normally a VM (Virtual Machine) or Docker Container
Read the whole thing.