The moon and planets are very short exposure, one second or less. No guiding is needed. For galaxies and other stuff, you need much longer exposures. Anywhere from 5 minutes to hundreds of minutes. A motor drive will hold the image in the field for these long exposures. I've seen pictures where it says manually guided, meaning yes, the person moved the telescope by hand to keep the image in the field. Not so easy and I imagine you get quite a few bad pictures for every good one.
That's it;
BOB SAL