I was actually intrigued by this question, because honestly, I didn’t know! I did know it was directly related to video file formats, but what exactly it stood for I had no clue.
So I decided to check it out, and here you go – straight from MPEG.org:
What is MPEG?
MPEG (pronounced M-peg), which stands for Moving Picture Experts Group, is the name of a family of standards used for coding audio-visual information (e.g., movies, video, music) in a digital compressed format.
The major advantage of MPEG compared to other video and audio coding formats is that MPEG files are much smaller for the same quality. This is because MPEG uses very sophisticated compression techniques.
So now you know…