This is just one example, but radio is released at around -23 LUFS (audio loudness standard), while podcasts require to be much louder, at -16 LUFS and sometimes even more.

It's a simple fix, and it needs to be done, yet it seems many still don't know to do it.

p.s. Editor's note: If you want to auto-master your podcast audio, take a look at Clipgain.io