- If you'd like to stop the mess with downstream / upstream jobs chains definitions
- When you want to add full hierarchy of Jenkins jobs that will be executed in sequence or in parallel
- Add context to your buildflow implementing parameter inheritance from the MultiJob to all its Phases and Jobs, Phases are sequential whilst jobs inside each Phase are parallel
In version 1.17 we inject new variables to use them in conditions, powering this feature. You can read the details (variable names, values, ...) here.