The pipeline is the heart and soul of Wercker, it’s where you define the actions (steps) and environment for your tasks, often your tests, builds and deploys. They are an aggregate of steps and will pass or fail based on the steps within.
Each pipeline also comes with an environment, some set by default by the Wercker tool and, when run by wercker.com, others defined by the settings you’ve entered on wercker.com.
Steps are the actions performed within pipelines.
The configuration file and format for your pipelines is the wercker.yml file.
Every artifact from a build pipeline is both a Docker container as well as a
tarball of the source code.