A voice memo with a long pause at the start, a song you want a ringtone from, a call where only one minute matters. Trimming gets you just that part.
A cut that begins exactly on a loud sound can feel abrupt. Start a fraction of a second before the first word, where the waveform is nearly flat, and end just after the last one has faded.
If you need to remove something from the middle, trim the part before and the part after as two separate clips, then put them together with the Join audio tool.
Saving as MP3 encodes the clip once more. At 192 kbps or higher that is inaudible, but if you will be editing it again, save as WAV in between.
The sliders move in tenths of a second, which is fine enough to cut cleanly between words.
No. You get a new file and your recording stays as it was.
Yes, on any audio your browser can open. Make sure you have the right to use it.