JPG compression VS File Size

Quality: 100

File Size: 55,948 bytes

A .jpg with 100 quality has a large file size because it does it's best to preserve as much of the colors it can. There are no .jpg artifacts.

 Quality: 60

File Size: 19,467 bytes

A .jpg quality 60 is of "average" size. It doesn't work as hard to preserve colors and sharpness of line. There are some .jpg artifacts.

Quality: 0

File Size: 5,865 bytes

A .jpg quality 0 has been so compressed, that it does not try to preserve line or colors. The picture is fuzzy and has plenty of .jpg artifacts.