Treble clef vs bass clef
The clef at the start of a staff fixes its pitches. The two you meet first are the treble clef and the bass clef.
The treble (G) clef
The treble clef curls around the second line from the bottom, marking it as the G above middle C — which is why it is also called the G clef. It suits higher instruments: voice, violin, flute, trumpet, guitar and the right hand of the piano.
The bass (F) clef
The bass clef’s two dots sit either side of the fourth line, marking it as the F below middle C — hence the F clef. It suits lower instruments: cello, double bass, bassoon, trombone, tuba and the left hand of the piano.
Where they meet
On the grand staff, the treble and bass clefs are joined by a brace so a pianist reads both at once. Middle C sits just below the treble staff and just above the bass staff — the note where the two clefs almost touch.