I'd like to learn more about the `BITBUCKET_STEP_RUN_NUMBER` default variable in the Atlassian Bitbucket Cloud Pipelines Plugin.
Whenever I access it, its' value is the integer number "1".
The description on the Variables in pipelines page gives the following information:
BITBUCKET_STEP_RUN_NUMBER - Number of times a step has been executed per pipeline.
What I'm interested in specific is that I ask myself how it could have any other number than "1" because as far as I understand it, a step within a pipeline can only be executed once. But then why should there be a variable for it? So therefore I somehow have the feeling I'm missing some interesting details here, so maybe someone else might have an example where that variable has a different value than "1" or what a use-case could be.