JPEG, which stands for Joint Photographic Experts Group, is a popular image file format commonly used for storing and sharing digital photos. It uses lossy compression to significantly reduce file sizes, making it ideal for web use and email attachments. However, this compression can lead to a loss of image quality if the file is repeatedly edited and saved. In cybersecurity, JPEG files can sometimes be used to hide malicious code or data through techniques like steganography. As a result, users are advised to be cautious when opening JPEG files from unknown sources, as they may contain hidden threats. JPEG files typically have extensions like .jpg or .jpeg.