A symbol in musical notation consisting of two vertical lines drawn close together, extending from the top to the bottom line of the staff. It denotes the end of a section within a piece or the end of the entire composition. Its appearance signals a structural division or the conclusive point of the music.
This notational element serves to visually organize the musical structure, providing clarity for performers and readers. Historically, its use has evolved to clearly demarcate sections such as verses, choruses, or movements within larger works. It facilitates understanding and navigation of the score, thereby aiding in both performance and analysis.