The bass clef is a musical symbol used to indicate lower pitches on a staff. It is often associated with instruments like the trombone, bass guitar, and cello, as well as the left hand in piano music. The bass clef looks like a stylized letter "F" and marks the fourth line of the staff as the note F below middle C. In sheet music, notes placed on or between the lines of the bass clef represent specific pitches. The lines from bottom to top are G, B, D, F, and A, while the spaces represent A, C, E, and G. This system helps musicians read and perform music accurately.