Simply put, a staff (also known as staff) is the set of lines on which notes are placed in a musical score. Each staff has five lines, creating four spaces between them.
Depending on where notes have been placed (on or between lines) on a staff indicates which note should be played. The notes follow the alphabet from A to G, before returning to A again. If a note is placed on the bottom line of a treble clef staff (which spans the soprano and alto ranges), it represents E above middle C (also known as C4), space between the two lower lines represents the F, and so on until you reach F again (an octave higher) on the upper line of the staff.
Popular mnemonics to help people remember the order of notes on the treble clef staff include Every Good Boy Does Fine (EGBDF), for the notes on each line of the staff, starting with E on the bottom line. Whereas ‘FACE’ is used as a cue for notes in the spaces between lines, starting with F between the bottom two lines of the staff.
However, the bottom line on a bass clef staff (which spans the tenor and bass ranges) represents G2 (two octaves lower than G above middle C). The notes then follow the same A to G pattern up to the top line, which represents the A below middle C.
Other elements of a musical score, such as clefs, time signatures, bar lines, and rests, are also included in the lines of a staff. While items such as tempo and the dynamics are usually written above or below the staff.
Some notes are also placed above or below the staff range, on (or either side of) what are known as ledger (or leger) lines.