Step
A step is the atomic unit of work that knope operates on. In a workflow, steps will be executed sequentially until one fails or all steps are completed.
In it's simplest form, a step is declared in a workflow like this:
[[workflows]]
name = "My Workflow"
[[workflows.steps]]
type = "AStepType"
more_info = "Something"
Where type matches one of the available steps listed below. Some steps also can take additional parameters in config, those go right underneath type like more_info above.