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MPEG-4 is a digital multimedia format that is used for compressing and storing audio and video files. It was developed by the Moving Picture Experts Group (MPEG) and was first released in 1998. MPEG-4 has several features that make it popular, including its ability to handle different types of media, its support for interactivity, and its ability to provide high-quality video at low bitrates.

One of the key advantages of MPEG-4 is its flexibility. It can be used for a wide range of applications, from streaming video over the internet to creating interactive multimedia presentations. The format also supports a variety of codecs (compression/decompression algorithms), which allows users to choose the best one for their specific needs.

Another important feature of MPEG-4 is its support for interactivity. This means that users can interact with the content they are viewing, such as clicking on links or buttons within a video or game. This makes it ideal for creating interactive educational materials or games.

Finally, MPEG-4 provides high-quality video at low bitrates. This means that files can be compressed without sacrificing too much quality, making them easier to store and transmit over networks with limited bandwidth.

Overall, MPEG-4 is an important format in digital multimedia because it offers flexibility, interactivity, and high-quality compression capabilities all in one package.