In some audio files, you might find information about the Band that recorded and performed the music inside the file. For music files, this is quite common information to be stored in the metadata. In contrast to the artist information, Band indicates that more than one person performed the track. What the individual people in the band do, providing the vocals or playing an instrument, does not matter in this case.
Sometimes, the Band information may contain a VA value. This abbreviation stands for various artists, meaning that not one specific artist or band recorded the song. It is more of a collaboration of different artists, bands or band members.