Online research (Desk research)
To understand existing podcast trends, I have conducted research online, here were my findings that I found particularly interesting:

Only 90%
of Australia listen to podcasts, lower than the global average than 41%. (Sang et al, 2020)

Multitasking
More than half of podcast listeners consume podcasts while multitasking:"59% have listened while doing housework. 52% while driving. 51% while cooking. And 46% while going for a walk.” (The Edison Research, 2017)
The statistic on multitasking sparked my interest most, thus I decided to begin from there.