what is mpg
MPG or mpg may refer to: . 1 mpg, one of a number of file extensions for MPEG-1 or MPEG-2 audio and video compression. 2  General Motors Milford Proving Ground. 3  Media Planning Group, former name of Havas Media, a media division of Havas.4  MPG (gene) , a human gene.5  M.P.G. , a 1969 album by Marvin Gaye. .mpg, one of a number of file extensions for MPEG-1 or MPEG-2 audio and video compression. 2  General Motors Milford Proving Ground. 3  Media Planning Group, former name of Havas Media, a media division of Havas. 4  MPG (gene) , a human gene.