JPEG (Joint Photographic Experts Group) is a widely used method of lossy compression for digital images, particularly for those produced by digital photography. The degree of compression can be adjusted, allowing a selectable trade-off between storage size and image quality. JPEG typically achieves 10:1 compression with little perceptible loss in image quality. JPEG images are stored in a format that uses a discrete cosine transform (DCT). This mathematical transformation converts spatial image data into frequency components, allowing the algorithm to discard high-frequency components that are less perceptible to the human eye. This process results in a smaller file size but also introduces some loss of detail. Because of its efficient compression and widespread support, JPEG is the dominant image format on the World Wide Web and is used in many digital cameras and other image capture devices. It's suitable for photographs and complex images with gradual color variations but less ideal for images with sharp lines, text, or graphics, where other formats like PNG may be more appropriate.