JPEG compression is a widely used method in cybersecurity and digital imaging for reducing the size of image files. It works by transforming image data into frequency components using mathematical techniques related to the Fourier transform. The process identifies and removes less visually significant information, resulting in smaller file sizes with minimal quality loss. While this is efficient for storage and transmission, it can also introduce artifacts and reduce image fidelity if overused. In cybersecurity, understanding JPEG compression is important for analyzing image-based steganography, detecting tampered images, and managing data transfer securely and efficiently.