A better result usually starts before the first click in the studio. If the source file is cleaner, better framed, and closer to the final goal, background removal, upscaling, and resizing all have a better chance of producing a result worth using.
Use the original file if you can. Screenshots, social-media reuploads, and compressed forwards often strip out the very detail the tool needs to work well. If you have a camera export, scan, or original download, use that instead of a smaller copy.
Crop out empty borders, unrelated background space, and obvious distractions before processing. The goal is not to make the file tiny. The goal is to give the editor a tighter frame around the subject so the workflow spends its effort on the useful part of the image.
Small borders, extra blank space, and unrelated edges that do not help the final output.
Cutting into the subject, removing context you still need, or forcing the subject too close to the frame.
Background removal works best when the subject stands apart from the backdrop. If the background is already busy, reflective, or very close in color to the subject, the automatic edge work has more to sort out.
If the end goal is a listing image, a social post, or a header asset, decide that before you upload. It is easier to remove a background and then resize to a known destination than to guess the goal after the file is already processed.
When the destination is still unknown, keep the crop a little wider and avoid over-committing to a single format too early.
PNG, JPG, and WEBP are usually the cleanest starting points for this workflow. If the file has already gone through several rounds of resizing or reposting, try to find a cleaner source before you process it again.
If you need both a cleaned cutout and an exact delivery size, do the structural work first and the final sizing last. That usually means remove the background, review the cutout, upscale only if necessary, and then resize to the final dimensions.