Trimming is often all a recording needs
Voice recordings rarely begin and end at the exact useful moment. Someone presses record, waits a few seconds, speaks, then leaves another pause before stopping it.
Those extra sections add nothing when the file is being sent for review. Audio trimming lets you keep the useful part without changing the rest of the recording simply for the sake of editing it.
The same approach works for a podcast when you only want one short excerpt. Instead of sending an entire episode to somebody who needs to hear thirty seconds, you can prepare the relevant section as its own clip.

