: It uses "lossy" compression, which reduces file size by removing details that are less noticeable to the human eye.
: A standard prefix used by many digital cameras and smartphones to indicate the file contains an image.
A guide to image file formats and image file types | Adobe Acrobat
The JPG format is favored for online content and mobile devices because it balances quality and file size.
If you have found this file name in a download link or system folder:
: JPG files are universal and can be opened by almost any web browser, image editor (like Adobe Photoshop ), or mobile gallery app.
: The file extension for JPEG (Joint Photographic Experts Group), the most widely used format for digital photographs. Key Features of JPEG/JPG Files