Real estate photographs need to show a space clearly and honestly. Compression is a delivery step after you have chosen and edited the photographs. It is not a substitute for correcting perspective, choosing a better exposure or capturing an important feature. This tool does not straighten walls, replace skies, brighten a room or remove objects from a property image.
Keep the original set and any edited masters. A portal may need one export today while a brochure or another listing service needs a different size later. Separate exterior, interior and detail images if they require different crops. Fit within preserves the whole frame, which is useful when doorway edges or room corners matter. Exact cropping can improve a thumbnail composition, but check that it does not hide a relevant part of the space.