JPEG (the acronym for Joint Photographic Experts Group) is a popular method of lossy compression for photographic images.
The compression degree can be easily changed allowing users to achieve the balance they require between the picture's quality and its size on the disk.
JPEG is one of the most common picture formats used by image capture devices and digital cameras, also containing information in the form of metadata.
Consequently, JPEG viewers will allow users to preview their images and their corresponding EXIF data.
Additionally, one can also rely on JPEG-compatible applications to edit the pictures on a basic level (rotate, enlarge, resize or crop) and to export them to other graphic formats.