The track is know as the runway, fretboard, or extended guitar neck. It is the path that the notes travel down. The track can change size depending on the difficulty, and it can change in other visible ways depending on the game type.
A track can also be the note chart, chart, or fretting created by a charter, tracker, or fretter. It is the set path of notes chosen by the tracker. The tracker sets the sync and placement of notes for a song.