A staff, in music, is a set of five horizontal lines and four spaces that represent different musical pitches. Each line and space corresponds to a specific note.
When you write music, notes are placed either on the lines or in the spaces. The position of the note indicates its pitch. For example, on the treble clef staff, the bottom line is an E, and the top line is an F. The spaces between the lines spell out the word FACE, representing the notes in those spaces.
The staff can be modified with different clefs, such as the treble clef or bass clef, which determines which notes are represented on the staff lines. Overall, the staff is a fundamental component of musical notation, allowing composers to convey their musical ideas clearly and systematically.