JPEG Stands for "Joint Photographic Experts Group" files and it is mostly a lossy format.
"JPG" is its DOS filename extension. Almost all digital cameras are able to save images
in JPEG format, as it supports 8 bits per color (red, green, blue) for a 24-bit total and
produce files of relatively small size.

JPEG files suffer generational degradation due to repeated editing and saving, but if
you just want to store the images for an easy backup or final distribution and has no
further editing need, JPEG is a good choice. It is usually better for the Photographic
images that need re-editing to stored in a lossless non-JPEG format, in order to avoid
unacceptable blemishes caused by the JPEG's compression algorithm. JPEG format is
frequently applied in many PDF files as the image compression algorithm as well.