Sometimes a large task may be more clearly viewed as more manageable once broken down into stages. The way it works is to check the "Show List as Agenda /Stages"
Using the same technique, events may be created with an actual breakdown of timings such as an event schedule or meeting agenda.
An example event with an schedule breakdown can be found here:
Below is a video explainer, so it can be seen how to create a breakdown of task into stages.