MPEG-4 is a digital multimedia format used for compressing and storing audio and video files. It allows for high-quality playback while reducing file sizes, making it easier to stream and download content over the internet. This format is widely used in various applications, including online video streaming, video conferencing, and mobile devices. Developed by the Moving Picture Experts Group, MPEG-4 supports a range of media types, including 2D and 3D graphics, text, and still images. It is commonly used in video-sharing platforms and is compatible with many devices, ensuring broad accessibility for users.