JPEG quality controls the level of compression when saving a JPEG file. The higher the quality, the less compression, and vice versa. We recommend 100% for almost all products, but on some of our larger fabric products we recommend 75%. There are two reasons for this: (1.) A 100% quality JPEG could be too large to upload for products such as beach towels (2.) On fabrics, 100% quality and 75% quality often look identical because of the texture in the fabric.