A wide crop can be useful for a gallery, presentation, website banner or video-related still image. Start by checking the actual slot where it will appear. This preset uses 16:9 at 1920 by 1080 pixels as an example. A shallow website banner or social link preview may need another ratio, and a gallery may work better with the complete original photograph.
Exact size crops images whose proportions differ. A tall source can lose the top and bottom, while a very wide panorama can lose the sides. Fit within preserves the full source but does not add letterboxing to make it a 16:9 file. Keep the original and make a separate delivery copy for each role. The tool does not extend a sky, move a person or generate the missing scene outside the camera frame.