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Most JPEG files contain EXIF data , which can store interesting "hidden" features such as the exact camera settings, date, time, and even the GPS coordinates of where the photo was taken .

JPEGs use a process called "lossy" compression, which intelligently discards data the human eye is less likely to notice . This allows for a massive reduction in file size while maintaining a high perceived quality . 20918011_yvq738_003.jpg

Due to their small file sizes, they are the standard for web images and email attachments, ensuring pages load quickly and files transfer at high speeds . Most JPEG files contain EXIF data , which