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JPG
Abbreviation for Joint Photographic Experts Group
In short and in plain language
JPG is the usual file ending of a well-known image format.
The format makes photos smaller. Some quality is lost when it does this.
It is widely used, most of all for photos. Newer formats often make smaller files. The quality stays about the same.
Definition
JPG is the common file extension of the JPEG image format, which compresses photos with some loss of quality. It is widely used and suits photos in particular. Newer image formats often achieve smaller files at similar image quality.