JPEG photo files make sharing photos on a computer easier and faster. But you should be aware of specific changes to a photo that happen when a photo is compressed into a JPEG file. A given color in a photo may have a variety of shades to it. But, JPEG files may take all these shades and save them as one shade of that particular color. This is how space is saved. You may want to especially take notice of flesh tones as they may be the most noticable loss of quality when a photo is saved in a JPEG file.